Pyrazolidinone CCK and gastrin antagonists and pharmaceutical formulations thereof

ABSTRACT

Novel substituted pyrazolidinones have been found to exhibit significant binding to cholecystokinin (CCK) receptors and gastrin receptors in the brain and/or peripheral sites such as the pancreas, stomach, and ileum. The pyrazolidinones are CCK and gastrin receptor antagonists and find therapeutic application in the treatment of gastrointestinal disorders, central nervous system disorders and for appetite regulation in warm-blood vertebrates. Pharmaceutical formulations for such indications are described.

CROSS REFERENCE

This application is a continuation of application Ser. No. 07/982,257 filed Nov. 25, 1992, abandoned which is a continuation of Ser. No. 07/737,624, filed Jul. 30, 1991 (now abandoned), which is a continuation-in-part of Ser. No. 07/553,489, filed Jul. 17, 1990 (now abandoned).

BACKGROUND AND SUMMARY OF THE INVENTION

This invention relates to biologically active pyrazolidinones. More particularly, this invention is directed to certain substituted pyrazolidinones which bind to receptors for cholecystokinin (CCK), e.g., those of the brain and pancreas, and to receptors for gastrin, e.g., those of the stomach. The compounds are CCK and gastrin antagonists and are useful in the treatment and prevention of CCK and gastrin-related disorders of the gastrointestinal, central nervous and appetite regulatory systems of warm-blooded vertebrates, especially humans.

BACKGROUND OF THE INVENTION

Cholecystokinin (CCK) is a neuropeptide found in both gastrointestinal tissue and the tissues of the central nervous system. CCK is believed to play an important role in appetite regulation. Among the effects of CCK are stimulation of colonic motility, stimulation of gall bladder contraction, stimulation of pancreatic enzyme secretion, and inhibition of gastric emptying. CCK reportedly coexists with dopamine in certain mid-brain neurons and thus may also play a role in the functioning of dopaminergic systems in the brain Gastrin is a neuropeptide found particularly in the gastrointestinal tract. It is one of the primary natural stimulators of gastric acid secretion. It also has growth stimulatory effects on a variety of gastro-intestinal tissues.

CCK and gastrin antagonists are useful in the treatment and prevention of CCK and gastrin-related disorders of the gastrointestinal and central nervous systems, as well as modulation of the appetite regulatory systems of warm-blooded vertebrates. The CCK/gastrin receptor family is thought to contain three receptor subtypes, for which the location of the prototype receptor is given in parentheses: CCK-A (pancreas), CCK-B (brain), and gastrin (stomach fundus).

Several classes of CCK receptor antagonists have been reported in the literature. One class comprises derivatives of cyclic nucleotides, for example, dibutyryl cyclic GMP. Another art recognized class of CCK antagonists comprise the C-terminal fragments and analogs of CCK. Another class of CCK receptor antagonists are amino acid derivatives including proglumide, a derivative of glutaramic acid, and the N-acyltryptophanes such as p-chlorobenzoyl-L-tryptophan. More recently certain substituted amino phenyl compounds were described as CCK antagonists in published European Patent Application 0166355. Because of the wide range of potential clinical applications of CCK binding compounds, intensive research efforts have been ongoing to define other compounds exhibiting CCK receptor binding properties.

SUMMARY OF THE INVENTION

This invention is directed to novel pyrazolidinone compounds of Formula I or II below which have been found to exhibit CCK and gastrin antagonist activity. These compounds are useful in the treatment and prevention of CCK-related disorders of the gastrointestinal and central nervous systems, as well as in modulating the appetite regulatory systems of warm-blooded vertebrates, especially humans. As gastrin antagonists, they are particularly useful in the treatment and prevention of gastrointestinal ulcers, and of neoplasms of gastrointestinal origin.

DETAILED DESCRIPTION OF THE INVENTION

This invention is directed to compounds of the formula ##STR1## wherein R and R¹ are independently hydrogen, C₁ -C₆ alkyl, phenyl, benzyl, naphthyl, pyridyl or substituted phenyl having 1, 2, or 3 substituents selected from the group consisting of C₁ -C₆ alkyl, C₁ -C₆ alkoxy, C₁ -C₆ alkylthio, halo, trifluoromethyl, phenyl, phenoxy, phenyl(C₁ -C₄ alkyl), phenyl(C₁ -C₄ alkoxy), phenylacetyl, C₁ -C₆ alkanoyl, cyano, carbamyl, nitro, C₁ -C₆ alkoxycarbonyl, methylenedioxy, C₃ -C₆ alkylene, amino, --NH(C₁ -C₄ alkyl or benzyl) and N(C₁ -C₄ alkyl)₂ ;

R₂ is hydrogen, C₁ -C₆ alkyl, carboxymethyl, C₁ -C₄ alkoxycarbonylmethyl or a group of the formula ##STR2## wherein t is 1 or 0; A is --CH₂ --, --O--, --NH-- or --N(C₁ -C₆ alkyl)--; and Y is phenyl or substituted phenyl as defined above;

R₄ is C₁ -C₆ alkyl, carboxymethyl, or C₁ -C₄ alkoxycarbonylmethyl;

R₃ is hydrogen or a group of the formula ##STR3## wherein B is O or S; X is selected from the phenyl substituents defined above; m is 0, 1 or 2; n is 0 or 1; Q is --NH--, --N(C₁ -C₆ alkyl)--, --S--, or --O--; and R⁵ is a group of the formula --[CH(R⁶)]_(q) --(CH₂)_(r) --R⁷ wherein R⁶ is hydrogen or C₁ -C₆ alkyl; q is 0 or 1; r is 0, 1 or 2; and R⁷ is hydrogen, C₁ -C₈ alkyl, C₃ -C₈ cycloalkyl, pentafluorophenyl, pyridyl, tetrahydro-naphthyl, indolyl, quinolinyl, phenyl, naphthyl, or phenyl or naphthyl substituted with 1, 2, or 3 substituents as defined above for phenyl; or the group --(Q)_(n) R⁵ is 2-tetrahydroisoquinolinyl; and the pharmaceutically acceptable salts thereof; provided that at least one of the groups R or R¹ is other than hydrogen or C₁ -C₆ alkyl, and R or R¹ is hydrogen only when the other of R and R¹ is substituted phenyl in which the substituent is phenyl; and provided further that at least one of the groups R₂ and R₃ is other than hydrogen, and when R³ is a group of the formula ##STR4## R² is other than a group of the formula ##STR5##

In the compounds of Formula I or II, the groups R and R¹ can be in either the cis or trans configuration relative to the plane of the pyrazolidinone ring. The trans configuration, preferred in accordance with the present invention, is indicated to be the thermodynamically favored form.

As used herein "halo" refers to fluoro, chloro, or bromo. The term "C₁ -C₆ alkyl" includes both straight and branched chain alkyl and cycloalkyl and includes methyl, ethyl, propyl, cyclopropyl, isopropyl, butyl, methylcyclopropyl, cyclobutyl, isobutyl, t-butyl, pentyl, cyclopentyl, neopentyl, hexyl, cyclohexyl, 2-methylpentyl and the like. In the "C₁ -C₆ alkoxy" and "C₁ -C₆ alkylthio" substituents, the alkyl portion is C₁ -C₆ alkyl as defined above. The term "C₁ -C₆ alkanoyl" includes formyl, acetyl, propionyl, butyryl, pentanoyl, hexanoyl, and the like.

The term "pharmaceutically acceptable salts" encompasses those salts that form by standard acid-base reactions with basic groups (such as amino groups) and acidic groups, particularly carboxylic acid groups, on the compounds of Formula I or II. Thus, the pharmaceutically acceptable salts of the present invention can be prepared by conventional chemical methods from the compounds of Formula I or II which contain a basic or acidic moiety. Generally, the salts are prepared by reacting the free base or acid with a stoichiometric amount or with an excess of the desired salt-forming acid or base in a suitable solvent or combination of solvents. Suitable salt-forming acids include inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, nitric, and the like; organic acids such as acetic, propionic, succinic, glycolic, stearic, lactic, citric, malic, tartaric, ascorbic, pamoic, maleic, hydroxymaleic, phenylacetic, glutamic, benzoic, salicylic, sulfanilic, 2-acetoxybenzoic, fumaric, toluenesulfonic, methanesulfonic, ethanedisulfonic, oxalic, benzenesulfonic, picric, cinnamic, and like acids. Bases which find use for preparation of salts of compounds of Formula I or II having an acidic moiety include alkali or alkaline earth metal hydroxides such as sodium, potassium, lithium, calcium, or magnesium hydroxides, ammonia, or organic bases such as benzylamine, dibenzylamine, dibenzylethylenediamine, triethylamine, trimethylamine, piperidine, pyrrolidine, 2-hydroxyethylamine, bis(2-hydroxyethyl)amine, phenylethylbenzylamine, and like organic amines.

The compounds of this invention bind to CCK and gastrin receptors in the brain and/or peripheral sites such as the pancreas, gall bladder, stomach, and ileum. Their ability to antagonize CCK and gastrin makes these compounds useful as pharmaceutical agents for the treatment and prevention of disease states wherein CCK or gastrin may be involved, for example, gastrointestinal disorders such as irritable bowel syndrome, ulcers, excess pancreatic or gastric secretion, acute pancreatitis, motility disorders, neoplasms of gastrointestinal origin, central nervous system disorders involving CCK's interaction with dopamine, such as neuroleptic disorders, tardive dyskinesia, Parkinson's disease, psychosis or Gilles de la Tourette Syndrome, other CNS disorders where CCK is believed to be a causative factor, such as panic attacks and other forms of anxiety, and in modulating appetite regulatory systems.

Preferred CCK and gastrin receptor binding compounds of this invention are the pyrazolidinones of Formula I, particularly those wherein R and R¹ are in the trans configuration relative to the plane of the pyrazolidinone ring. Preferably, R and R¹ are phenyl or substituted phenyl. A preferred group of compounds of Formula I are those wherein R² is hydrogen and R³ is a group of the formula ##STR6## One series of such preferred compounds of this invention are those wherein B is sulfur, n is 1, Q is --NH--, and R⁵ is phenyl or substituted phenyl.

Another preferred group of compounds exhibiting a consistent pattern of significant binding to CCK and gastrin receptors are those compounds of Formula I wherein R² is hydrogen and R³ is a moiety defined by the group --CONH--[CH(R⁶)]_(q) -(CH₂)_(r) -R⁷. Especially preferred of those compounds are those wherein q and r are 0 and R⁷ is phenyl, substituted phenyl, 2-naphthyl or 3-quinolinyl and R and R¹ are phenyl, naphthyl, or substituted phenyl in the trans configuration relative to the plane of the pyrazolidinone ring. When R⁷ is substituted phenyl, preferred substituents are halo, more particularly, chloro, bromo or iodo; trifluoromethyl; C₁ -C₄ alkyl; C₃ -C₄ alkylene; benzyloxy; and methylthio.

The compounds of this invention are readily prepared from the corresponding compounds of the formula ##STR7## The intermediate 3-pyrazolidinones are readily prepared by reacting hydrazine with the corresponding α,β-unsaturated esters of the formula R¹ --CH═C(R)--COOR' wherein R and R¹ are as defined above and R' is an ester forming group, typically C₁ -C₆ alkyl. The present compounds are prepared generally by acylating or alkylating the 3-pyrazolidinones of Formula III under neutral or basic conditions with acylating or alkylating agents selected to give the targeted compound of this invention.

In another embodiment of this invention there is provided pharmaceutical formulations comprising as an active ingredient an effective amount of a compound of Formula I or II and a pharmaceutically acceptable carrier, excipient or diluent therefor. Such formulations can be prepared for oral or parenteral administration for the treatment and prevention of disorders of the gastrointestinal, central nervous and appetite regulatory systems of warm-blooded vertebrates, especially a man.

For oral use of an antagonist of CCK or gastrin of this invention, the selected compound can be administered, for example, in the form of tablets or capsules, or as an aqueous solution or suspension. In the case of tablets, common excipients include binding agents, for example, syrup, acacia, gelatin, sorbitol, tragacanth, polyvinylpyrrolidine (Povidone), methylcellulose, ethylcellulose, sodium carboxymethylcellulose, hydroxypropylmethylcellulose, sucrose and starch; fillers and carriers, for example, corn starch, gelatin, lactose, sucrose, microcrystalline cellulose, kaolin, mannitol, dicalcium phosphate, sodium chloride and alginic acid; lubricants such as magnesium stearate; disintegrants such as croscarmellose, microcrystalline cellulose, corn starch, sodium starch glycolate and alginic acid; and suitable wetting agents such as lauryl sulfate. For oral administration in capsule form, useful diluents include lactose and dried corn starch. When aqueous suspensions are desirable for oral use, the active ingredient can be combined with emulsifying and suspending agents, for example, sorbitol, methylcellulose, glucose/sugar syrup, gelatin, hydroxyethylcellulose, carboxymethylcellulose, aluminum stearate gel or hydrogenated edible oils, for example, almond oil, fractionated coconut oil, oily esters, propylene glycol or ethyl alcohol; flavoring agents such as pepperment, oil of wintergreen, cherry flavoring or the like; and preservatives such as methyl or propyl p-hydroxybenzoates or ascorbic acid.

The pharmaceutical formulations in accordance with this invention can also be prepared for parenteral use. Such formulations typically take the form of sterile isotonic solutions of the active ingredient according to standard pharmaceutical practice.

The appropriate dose of the compound of the present invention for its use as an antagonist of CCK or gastrin in humans will vary according to the age, weight and response of the individual patient, as well as the severity of the patient symptoms and the nature of the condition being treated. Thus, the preferred daily dose will normally be determined by the prescribing physician. However, in most instances, effective daily doses of the compounds of this invention will range from about 0.05 mg to about 50 mg/kg and preferrably about 0.5 mg to about 20 mg/kg in a single or divided doses.

The following Examples are provided to describe further the compounds of this invention and methods for their preparation.

Tetrahydrofuran (THF) was dried by distillation from sodium/benzophenone. Reactions and workup steps were conducted at room temperature unless otherwise noted. Solvents were removed using a rotary evaporator at reduced pressure. Chromatography was performed on normal-phase silica columns except as noted. Titrations were performed in 2:1 DMF:H₂ O as solvent.

EXAMPLE 1 1-[(4-Chloro-3-trifluoromethylphenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone. [Method A]

4,5-Diphenyl-3-pyrazolidinone (3.00 g, 12.6 mmol) was dissolved in 40 mL THF under nitrogen, then a solution of 4-chloro-3-trifluoromethylphenylisocyanate (2.87 g, 13.0 mmol, 1.03 eq.) in 10 mL THF added over 2 min. After 2.3 hr, solvent was removed in vacuo, and the residue triturated with 25 mL toluene. The resulting solid was pulverized, washed twice with toluene, and dried in vacuo at 65° C. to give 4.94 g (85%) white solid.

¹ H NMR (d₆ -DMSO) δ 3.81 (br s, 1H), 5.56 (br s, 1H), 7.26-7.50 (m, 10H), 7.62 (d, J=9 Hz, 1H), 7.89 (dd, J=3, 9 Hz, 1H), 8.13 (br s, 1H), 9.64 (br s, 1H), 10.90 (br s, 1H); mass spectra (MS) 460 (M+1⁺);

Analysis for C₂₃ H₁₇ ClF₃ N₃ O₂ :

Calc.: C, 60.07; H, 3.73; N, 9.14;

Found: C, 59.99; H, 3.60; N, 8.89.

EXAMPLE 2 1-[(4-N,N-Dimethylaminophenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone. [Method B]

4-N,N-Dimethylaminoaniline (2.00 g, 14.68 mmol) and triethylamine (3.63 g, 35.87 mmol, 2.44 eq.) were dissolved in 50 mL toluene under nitrogen, then triphosgene (1.45 g, 4.89 mmol, 0.333 eq.) added in one batch as a neat solid. The mixture was heated to reflux for 2.5 hr, cooled, then quickly filtered, the collected solid washed twice with toluene, and the combined filtrates evaporated in vacuo to give crude 4-N,N-dimethylaminophenylisocyanate as 2.57 g brown oil. This was redissolved in 50 mL THF and a solution of 4,5-diphenyl-3-pyrazolidinone (3.50 g, 14.69 mmol, 1.00 eq.) in 50 mL THF added over 3 min. After 20.7 hr, solvent was removed in vacuo and the product isolated by chromatography (preparative HPLC; 0-50% EtOAc:toluene gradient) as 1.73 g yellow oil which slowly crystallized. Recrystallization from toluene gave 744 mg (13%) white crystalline solid:

¹ H NMR (d₆ -DMSO) δ 2.84 (s, 6H), 3.71 (s, 1H), 5.55 (s, 1H), 6.67 (d, J=8 Hz, 2H), 7.12-7.52 (m, 12H), 8.86 (br s, 1H), 10.70 (br s, 1H); MS 400 (M⁺); titration pK_(a) 's 4.0, 7.9.

Analysis for C₂₄ H₂₄ N₄ O₂ :

Calc.: C, 71.98, H, 6.04, N, 13.99;

Found: C, 72.08, H, 6.06, N, 14.06.

EXAMPLE 3 1-[(4-Benzyloxyphenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone [Method C]

4-Benzyloxybenzoic acid (2.0 g, 8.8 mmol) was suspended in 50 mL toluene with oxalyl chloride (5 mL) and heated to reflux for 15 min. Solvent was removed in vacuo, the residue redissolved in 30 mL acetone, and an aqueous solution of NaN₃ (1.16 g, 17.6 mmol, 2.0 eq. in 10 mL H₂ O) added dropwise with external cooling by a water bath. The mixture was stirred for 1 hour, diluted with H₂ O, extracted twice with toluene, then the combined extracts washed with water and brine, and dried over Na₂ SO₄. This solution of acyl azide was treated with 4,5-diphenyl-3-pyrazolidinone (1.6 g, 6.8 mmol, 0.76 eq.), warmed until bubbles evolved, and heating maintained for 30 min. After stirring overnight at room temperature, the solvent was removed in vacuo, and the product isolated by chromatography (0-30% EtOAc:hexane gradient) as 1.6 g (52%) white solid: mp 127°-30° C.;

¹ H NMR (CDCl₃) δ 3.95 (d, J=6 Hz, 1H), 5.0 (s, 2H), 5.55 (d, J=6 Hz, 1H), 6.8 (d, J=10 Hz, 2H), 6.86-7.46 (m, 16H), 7.05 (d, J=10 Hz, 2H), 8.95 (s, 1H); MS 463 (M⁺); titration pK_(a) 7.7.

Analysis for C₂₉ H₂₅ N₃ O₃ :

Calc.: C, 75.14; H, 5.44; N, 9.07;

Found: C, 75.15; H, 5.49; N, 9.14.

EXAMPLE 4 1-[(2-[1,2,3,4-Tetrahydronaphthyl])aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone [Method D]

1,2,3,4-Tetrahydro-2-naphthoic acid (639 mg, 3.63 mmol) was dissolved in 80 mL benzene under nitrogen, azeotropically dried by distilling a small portion of the solvent, then diphenylphosphorylazide (1.12 g, 4.08 mmol, 1.1 eq.) and Et₃ N (0.41 g, 4.02 mmol, 1.1 eq.) added and the mixture heated to reflux for 1 hour. Solvent was removed in vacuo, the residue dissolved in dry THF under nitrogen, and 4,5-diphenyl-3-pyrazolidinone (784 mg, 3.29 mmol, 0.91 eq.) added and the mixture stirred overnight. The solvent was removed in vacuo and the product isolated by chromatography (25-50% EtOAc:hexane gradient) as 0.92 g (68%) white foam. Recrystallization of a 120 mg sample from i-Pr₂ O:i-PrOH gave 94 mg white solid, containing a 1:1 mixture of two diastereomers by NMR: mp 82°-95° C.;

¹ H NMR (CDCl₃) δ 1.46-1.66 (m, 1H), 1.79-1.97 (m, 1H), 2.30-2.84 (m, 2H), 2.95 (apparent t of d, J=6, 16 Hz, 1H), 3.87 (apparent d, J=6 Hz, 1H), 4.09 (m, 1H), 5.12 (m, 1H), 5.34 (apparent d of d, J=6, 14 Hz, 1H), 6.86-7.40 (m, 14 H), c. 9.0 (v br s, 1H); MS 411 (M⁺).

Analysis for C₂₆ H₂₅ N₃ O₂ :

Calc.: C, 75.89; H, 6.12; N, 10.21;

Found: C, 75.75; H, 6.32; N, 9.72.

EXAMPLE 5 1-[(3-Trifluoromethylbenzoyl]-4,5-diphenyl-3-pyrazolidinone [Method E]

A solution of 4,5-diphenyl-3-pyrazolidinone (2.0 g, 8.4 mmol) in 50 mL CH₂ Cl₂ and 5 mL pyridine was treated dropwise with a solution of 3-trifluoromethylbenzoylchloride (1.4 g, 8.4 mmol) in 25 mL CH₂ Cl₂ and stirred overnight. The mixture was washed with 1N HCl, dried over Na₂ SO₄, evaporated, and the product isolated by chromatography (preparative HPLC) as 840 mg (24%) purple foam:

¹ H NMR (CDCl₃) δ 3.83 (s, 1H), 5.16 (s, 1H), 7.2-7.64 (m, 15H); MS 410 (M⁺); titration pK_(a) 7.15.

Analysis for C₂₃ H₁₇ F₃ N₂ O₂ :

Calc.: C, 67.31; H, 4.18; N, 6.83;

Found: C, 67.52; H, 4.18; N, 6.66.

EXAMPLE 6 1-[(4-Chlorophenyl)oxycarbonyl]-4,5-diphenyl-3-pyrazolidinone [Method F]

A solution of 4,5-diphenyl-3-pyrazolidinone (1.25 g, 5.26 mmol) in 50 mL CHCl₃ was treated with a solution of 4-chlorophenylchloroformate (1.0 g, 5.26 mmol) in 10 mL CHCl₃ and stirred overnight. The solvent was removed in vacuo and the residue recrystallized from EtOAc:hexane to give 1.6 g (58%) white solid: mp 175°-7° C.

¹ H NMR (CDCl₃) δ 3.98 (d, J=6 Hz, 1H), 5.62 (d, J=6 Hz, 1H), 6.8-7.5 (m, 15H); MS 392 (M⁺); titration pK_(a) 7.8.

Analysis for C₂₂ H₁₇ ClN₂ O₃ :

Calc.: C, 67.26; H, 4.36; N, 7.13;

Found: C, 67.49, H, 4.54, N, 7.17.

EXAMPLE 7 1-[(3,4-Dichlorobenzyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone [Method M]

A solution of 1-[(4-nitrophenyl)oxycarbonyl]-4,5-diphenyl-3-pyrazolidinone (1.00 g, 2.48 mmol) and 3,4-dichlorobenzylamine (5 mL) in 50 mL abs. EtOH was heated to reflux for 8 hours. Solvent was removed in vacuo, the residue taken up in CH₂ Cl₂, washed twice with 1N HCl and once with pH 7 buffer, and dried over Na₂ SO₄. After removal of solvent in vacuo, the product was purified by chromatography (0-35% EtOAc:hexane gradient) to give 250 mg (23%) solid:

¹ H NMR (CDCl₃) δ 3.93 (d, J=6 Hz, 1H), 4.28 (dABq, J=7, 15 (JAB) Hz, Δυ=48 Hz, 2H), 5.50 (d, J=6 Hz, 1H), 5.56 (br t, J=7 Hz, 1H), 6.92-7.44 (m, 13H), 8.73 (br s, 1H); MS 439 (M⁺); titration pK_(a) 8.4.

Analysis for C₂₃ H₁₉ Cl₂ N₃ O₂ :

Calc.: C, 62.74; H, 4.35; N, 9.54;

Found: C, 62.49; H, 4.53; N, 9.25.

EXAMPLE 8 2-[(4-Chloro-3-trifluoromethylphenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone [Method N]

1-[(4-Chloro-3-trifluoromethylphenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone (2.00 g, 4.35 mmol) in 100 mL toluene was heated at reflux for 24 hours. After removal of solvent in vacuo, the rearranged product was isolated by chromatography (CH₂ Cl₂), then recrystallized from i-Pr₂ O:hexane, to give 300 mg (15%) white solid: mp 72°-4° C.

¹ H NMR (CDCl₃) δ 4.22 (d, J=12 Hz, 1H), 4.82 (dd, J=9, 12 Hz, 1H), 5.44 (d, J=9 Hz, 1H), 7.20 (m, 2H), 7.32-7.42 (m, 8H), 7.46 (d, J=9 Hz, 1H), 7.72 (dd, J=3, 9 Hz, 1H), 7.87 (d, J=3 Hz, 1H), 10.56 (br s, 1H); MS 459 (M⁺).

Analysis for C₂₃ H₁₇ ClF₃ N₃ O₂ :

Calc.: C, 60.07; H, 3.73; N, 9.14;

Found: C, 59.95; H, 3.92; N, 8.88.

EXAMPLE 9 1-[6-Chloro-2-benzothiazolyl]-4,5-diphenyl-3-pyrazolidinone [Method O]

The reaction was conducted under a dry nitrogen atmosphere. A suspension of 4,5-diphenyl-3-pyrazolidinone (1.19 g, 5.00 mmol) in 35 mL toluene was treated with 0.40 g NaH (60% in mineral oil; hydride content 0.24 g, 10.0 mmol, 2.00 eq.), and the mixture stirred at 45° C. for 2 hours. 2,6-Dichlorobenzothiazole (1.02 g, 5.00 mmol, 1.00 eq.) was added and stirring continued at 80° C. for 20 hours. After cooling, the reaction mixture was poured onto 30 mL ice-cooled 0.5N HCl, extracted with EtOAc, and the separated organic phase washed twice with brine, dried over Na₂ SO₄, and the solvent evaporated in vacuo. The residue was recrystallized from Et₂ O:hexane to provide 1.46 g (72%) light tan crystals: mp 170.5°-2.5° C.

¹ H NMR (CDCl₃) δ 4.07 (br d, J=6 Hz, 1H), 5.24 (br d, J=6 Hz, 1H), 7.16-7.58 (m, 14H); MS 405 (M⁺); titration pK_(a) 6.6.

Analysis for C₂₂ H₁₆ ClN₃ OS:

Calc.: C, 65.10; H, 3.97; N, 10.35;

Found: C, 64.85; H, 4.13; N, 10.12.

EXAMPLE 10 1-[(4-Aminophenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone

1-[(4-Nitrophenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone (500 mg, 1.24 mmol) was dissolved in 50 mL EtOH and hydrogenated with 5% Pd/C (500 mg) under 60 p.s.i. H₂, overnight at room temperature. The mixture was filtered to remove catalyst, solvent removed in vacuo, and the product isolated by chromatography (0-50% EtOAc:hexane gradient) as 125 mg (27%) solid.

¹ H NMR (CDCl₃) δ 3.97 (d, J=6 Hz, 1H), 5.50 (d, J=6 Hz, 1H), 6.58 (d, J=10 Hz, 2H), 6.96 (d, J=10 Hz, 2H), 7.2-7.5 (m, 10H); MS 372 (M⁺); titration pK_(a) 4.5, 8.1.

Analysis for C₂₂ H₂₀ N₄ O₂ :

Calc.: C, 70.95; H, 5.41; N, 15.04;

Found: C, 70.65; H, 5.42; N, 14.75.

EXAMPLE 11 1-[(4-Bromophenyl)aminocarbonyl]-2-(O-t-butylcarboxymethyl)-4,5-diphenyl-3-pyrazolidinone and 1-[(4-bromophenyl)aminocarbonyl]-3(O-t-butylcarboxymethoxy)-4,5-diphenyl-2-pyrazoline

To a suspension of 1-[(4-bromophenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone (2.0 g, 4.6 mmol) in 30 mL abs. EtOH were added a solution of KOH (1.1 eq.) in abs. EtOH and t-butyl bromoacetate (5 mL). After stirring for 3 days a precipitate of KBr had appeared. The mixture was diluted with H₂ O, extracted with Et₂ O, then the Et₂ O layer washed with H₂ O and brine, dried over Na₂ SO₄, and evaporated in vacuo. An inseparable mixture of two products was isolated by chromatography (0-25% EtOAc:hexane gradient) as 1.3 g (52%) foam, containing a 3:2 ratio of N-alkylated to O-alkylated products [first and second title products, respectively] by NMR:

¹ H NMR (CDCl₃) N-alkylated: δ 1.53 (s, 9H), 3.96 (d, J=19 Hz, 1H), 4.06 (s, 1H), 4.65 (d, J=19 Hz, 1H), 5.95 (s, 1H), 7.23-7.46 (m, 14H), 9.70 (s, 1H); O-alkylated: δ 1.53 (s, 9H), 4.18 (d, J=7 Hz, 1H), 4.67 (s, 2H), 5.40 (d, J=7 Hz, 1H), 7.23-7.46 (m, 14H), 7.74 (s, 1H); MS 549, 551 (M⁺ 's for Br isotopes).

Analysis for C₂₈ H₂₈ BrN₃ O₄ :

Calc.: C, 61.10; H, 5.13; N, 7.63;

Found: C, 60.94, H, 4.93; N, 7.85.

EXAMPLE 12 1-[(4-Bromophenyl)aminocarbonyl]-2-carboxymethyl-4,5-diphenyl-3-pyrazolidinone and 1-[(4-bromophenyl)aminocarbonyl]-3-carboxymethoxy-4,5-diphenyl-2-pyrazoline

The regioisomeric mixture of t-butyl esters from Example 11 [c. 3:2 mixture of N- to O-alkylated] (500 mg, 0.91 mmol) was dissolved in 30 mL CH₂ Cl₂ and 5 mL trifluoroacetic acid. After 4 hours TLC (CH₂ Cl₂) indicated disappearance of starting materials. Solvent was removed in vacuo and a mixture of two products isolated by chromatography (0-100% EtOAc:hexane gradient) as 180 mg (40%) foam, comprised of a 4:3 ratio of N-alkylated to O-alkylated compounds [first and second title products, respectively] by NMR.

¹ H NMR (CDCl₃) N-alkylated: δ 4.09 (d, J=2 Hz, 1H), 4.10 (d, J=19 Hz, 1H), 4.68 (d, J=19 Hz, 1H), 5.83 (d, J=2 Hz, 1H), 7.20-7.50 (m, 14H), 9.08 (s, 1H); O-alkylated: δ 4.19 (d, J=5 Hz, 1H), 4.83 (ABq, J=16 Hz, Δυ=30 Hz, 2H), 5.46 (d, J=5 Hz, 1H), 7.20-7.50 (m, 14H), 7.75 (s, 1H); MS 493, 495 (M⁺ s for Br isotopes); titration pK_(a) 4.8.

Analysis for C₂₄ H₂₀ BrN₃ O₄ :

Calc.: C, 58.31; H, 4.08; N, 8.50;

Found: C, 58.59; H, 4.03; N, 8.24.

The N- and O-alkylated products were separated by chromatography on a Waters C₁₈ reverse-phase column, using 30-40% CH₃ CN:H₂ O buffered with 0.3-0.5% NH₄ OAc. The leading fractions from the first pass were evaporated, lyophilized, then taken up in CH₂ Cl₂, washed twice with 1N HCl, and the solvent removed in vacuo to provide 28 mg O-alkylated product:

¹ H NMR (CDCl₃ δ 4.19 (d, J=7 Hz, 1H), 4.84 (ABq, J=17 Hz, Δυ=25 Hz, 2H), 5.45 (d, J=7 Hz, 1H), 6.39 (br s, 1H), 7.20-7.40 (m, 14H), 7.70 (s, 1H).

The later fractions were rechromatographed twice more, then similarly processed to give 8 mg N-alkylated product:

¹ H NMR (CDCl₃) δ CDCl₃ 4.05 (s, 1H), 4.08 (br d, J=18 Hz, 1H), 4.70 (br d, J=18 Hz, 1H), 5.82 (s, 1H), 7.21-7.50 (m, 14H), 9.0 (br s, 1H).

EXAMPLE 13 1-[(4-Trifluoromethylphenyl)aminocarbonyl]-3-methoxy-4,5-diphenyl-2-pyrazoline

A solution of 1-[(4-trifluoromethylphenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone (740 mg, 1.74 mmol) and KOH (122 mg of 88% pure, 1.1 eq.) in 30 mL abs. EtOH was treated with iodomethane (5 mL) and stirred overnight. The mixture was diluted with H₂ O, extracted twice with CH₂ Cl₂, and the combined extracts washed with H₂ O, dried over Na₂ SO₄, and evaporated in vacuo. The product was isolated by chromatography (0-15% EtOAc:hexane gradient) as 61 mg (8%) solid.

¹ H NMR (CDCl₃) δ 4.0 (s, 3H), 4.11 (d, J=6 Hz, 1H), 5.48 (d, J=6 Hz, 1H), 7.2-7.74 (m, 14H), 8.09 (s, 1H); MS 439 (M⁺).

Also isolated was 1-[(4-trifluoromethylphenyl)aminocarbonyl]-2-methyl-4,5-diphenyl-3-pyrazolidinone, corresponding to a product prepared, according to the method of Example 1, from 2-methyl-4,5-diphenyl-3-pyrazolidinone and 4-trifluoromethylphenylisocyanate.

EXAMPLE 14 1-(Indole-2-carbonyl)-4,5-diphenyl-3-pyrazolidinone

Indole-2-carboxylic acid (1.35 g, 8.38 mmol), oxalyl chloride (4 mL), and DMF (3 drops) were added in order to 50 mL toluene, and stirred until gas evolution subsided and a homogeneous solution was obtained (c.20 min). Solvent was removed in vacuo, the residue taken up in CH₂ Cl₂, and added to a solution of 4,5-diphenyl-3-pyrazolidinone (2.0 g, 8.40 mmol, 1.00 eq.) in 50 mL CH₂ Cl₂ and 5 mL pyridine. After stirring overnight, the solution was washed with 1N HCl, dried over Na₂ SO₄, and solvent removed in vacuo. The residual solid was stirred with CH₂ Cl₂, filtered, and recrystallized from DMF:H₂ O to give 1.42 g (44%) white solid: mp 248°-50° C.

¹ H NMR (d₆ -DMSO) δ 3.82 (s, 1H), 5.86 (s, 1H), 6.95-7.6 (m, 16H), 11.84 (br s, 1H); MS 381 (M⁺); titration pK_(a) 6.75.

Analysis for C₂₄ H₁₉ N₃ O₂ :

Calc.: C, 75.57; H, 5.02; N, 11.02;

Found: C, 75.38, H, 5.21; N, 10.99.

Examples 15-135 are summarized below in Table I. The compound of each Example is identified by reference to the structural formula preceeding each group of Examples The method for preparing each compound is indicated by reference to the Methods A-O, corresponding to the procedures identified in the foregoing Examples 1-9. Example 133A, and Examples 137-138 in Table II follow the same format. Examples 136, 139A/139B, 140-143 are illustrated separately to show physical chemistry data as well as the individual methods of preparation of these compounds. The phenyl groups on the pyrazolidinone ring of the compounds of Examples 1-67, 74-109, and 136-143 are in the trans position.

    TABLE I       PHYSICAL CHEMISTRY DATA ON CCK/GASTRIN ANTAGONISTS            Analysis, % Method Solvent Yield, Mp, Theory/Found Ex. R of Prep.      of Cryst..sup.a % °C. MS 1HNMR Formula C H N       ##STR8##        Structure for examples 15-59 below  15 H A EtOAc: 22.0 g 168-70 357      (M+) DMSO 3.75(s, 1H), 5.58(s, 1H), C22H19N3O2 73.93 5.36 11.76      hexane 73%   6.96-7.53(m, 15H), 9.16(s, 1H),  73.84 5.42 11.75      10.8(s, 1H)  16 4-CF3 A (THF) PhMe 2.32 g  426 (M + 1) DMSO 3.80(br s,      1H), 5.58(br s, C23H18F3N3O2 64.94 4.26        9.88     43.3%   1H), 7.30-7.80(m, 14H), 9.54(br s,  64.67 4.09  9.75            1H), 10.90(br s, 1H)  17 4-F A EtOAc: 1.76 g 189-91 375 (M+) CDCl3      3.99(d, J=6Hz, 1H), 5.53 C22H18FN3O2 70.37 4.83 11.17    hexane 65%      (d, J=6Hz, 1H), 6.85-7.5(m, 14H),  70.24 4.85 11.09        8.95(br s,      1H)  18 4-Cl A EtOAc: 2.44 g 173-5 391 (M+) DMSO 3.78(s, 1H), 5.56(s,      1H), C22H18ClN3O2 67.43 4.63 10.72    hexane 48%   7.24-7.6(m, 14H),      9.32(s, 1H),  67.30 4.79 10.67        10.81(s, 1H)  19 4-Cl (NMe) B      chrom 60 mg  405 (M+) CDCl3 3.18(s, 3H), 3.53(d, J=3Hz, C23H20ClN3O2      (prep plates) 40%   1H), 4.86(d, J=3Hz, 1H), 6.9-        7.42(m, 15H)      20 4-Br A (THF) PhMe (to 2.64 g 174-6.sup.b 435, 437 DMSO 3.77(br s,      1H), 5.57(br s, C22H18BrN3O2.1/2 (C7H8) 63.49 4.60  8.71    give PhMe      58%  (M+'s for Br 1H), 7.12-7.55(m, 14H), 9.31(br s,  63.15 4.60  8.81       hemisolvate)   isotopes) 1H), 10.81(br s, 1H)  21 4-1 C EtOAc: 90 mg      177-9 483 (M+) CDCl3 4.0(d, J=6Hz, 1H), 5.54(d, C22H18IN3O2 54.67 3.75      8.69    hexane 2%   J=6Hz, 1H), 6.9-7.5(m, 14H)  54.46 3.70  8.51  22      4-CO2Et A chrom 480 mg  430 (M + 1) CDCl3 1.38(t, J=8Hz, 3H), 4.02      C25H23N3O4     11%   (d, J=6Hz, 1H), 4.34(q, J=8Hz,        2H), 5.56(d,      J=6Hz, 1H), 7.18-        7.95(m, 14H)  23 4-COMe A chrom 31 mg  399 (M+)      CDCl3 2.52(s, 3H), 4.03(d, J=6Hz, C24H21N3O3     1.2%   1H), 5.55(d,      J=6Hz, 1H), 7.31        (d, J=12Hz, 2H), 7.2-7.5(m, 11Hz),      7.83(d, J=12Hz, 2H), 9.18(br s, 1H)  24 4-NO2 A EtOAc: 1.8 g 168-70 402      (M+) DMSO 3.83(s, 1H), 5.58(s, 1H), C22H18N4O4 65.67 4.51 13.92      hexane 71%   7.25-7.5(m, 10H), 7.82(d, J=14Hz,  65.43 4.56 13.70      2H), 8.2(d, J=14Hz, 2H), 9.77        (s, 1H), 11.03(br s, 1H)  25 4-Me A      PhMe 1.72 g  371 (M+) DMSO 2.25(s, 3H), 3.75(s, 1H), C23H21N3O2 74.37      5.70 11.31     44%   5.57(br s, 1H), 7.08(d, J=8Hz,  74.52 5.50 11.10          2H), 7.3-7.5(m, 12H), 9.03(br s,        1H), 10.74(br s, 1H)  26      4-Et A triturated 3.74 g  385 (M+) DMSO 1.16(t, J=8Hz, 3H), 2.55      C24H23N3O2 74.78 6.01 10.90    with PhMe 92%   (q, J=8Hz, 2H), 3.74(br      s, 1H),  75.00 6.13 10.71        5.57(br s, 1H), 7.12(d, J=9Hz,      2H), 7.14-7.54(m, 12H), 9.06(br s,        1H), 10.76(br s, 1H)  27      4-n-Pr C EtOAc: 230 mg 169-71 400 (M + 1) CDCl3 0.9(t, J=10Hz, 3H), 1.58      C25H25N3O2 75.16 6.31 10.52    hexane 6%   (m, 2H), 2.5(t, J=10Hz, 2H),      4.0  75.07 6.23 10.50        (d, J=6Hz, 1H), 5.54(d, J=6Hz,        1H),      6.82(s, 1H), 7.03(d, J=12Hz,        2H, 7.1(d, J=12Hz, 2H), 7.23-7.5         (m, 10H), 8.62(br s, 1H)  28 4-n-Bu A EtOAc: 1.22 g 165-7 413 (M+)      CDCl3 0.95(t, J=10Hz, 3H), 1.3 C26H27N3O2 75.52 6.58 10.16    hexane 47%        (m, 2H), 1.5(m, 2H), 2.56(t, J=10Hz,  75.23 6.35  9.97        2H),      3.96(d, J=6Hz, 1H), 5.54        (d, J=6Hz, 1H), 6.93(s, 1H), 7.03      (d, J=12Hz, 2H), 7.1(d, J=12Hz,        2H), 7.23-7.46(m, 10H), 9.04(s,      1H)  29 4-IPr A THF: 10.g 191-3 399 (M+) CDCl3 1.21(d, J=10Hz, 6H), 2.83      C25H25N3O2 75.16 6.31 10.52    EtOAc 40%   (m, J=10Hz, 1H), 4.0(d,      J=6Hz,  75.37 6.42 10.46        1H), 5.53(d, J=6Hz, 1H), 6.83(s,      1H), 7.1-7.5(m, 14H), 8.65(s, 1H)  30 4-t-Bu C EtOAc 790 mg 204-7 413      (M+) CDCl3 1.26(s, 9H), 4.0(d, J=6Hz, C26H27N3O2 75.52 6.58 10.16      30%   1H), 5.50(d, J=6Hz, 1H), 6.83(s,  75.74 6.78 10.18        1H),      7.12(d, J=12Hz, 2H), 7.35(d,        J=12Hz, 2H), 7.2-7.44(m, 10H),       8.6(s, 1H)       31 4-c-Hexyl B chrom, 104 mg 200-3 439 (M+) DMSO 1.15-1.85(m, 10H),      2.22 C28H29N3O2 76.51 6.65  9.56    then 3%   (m, 1H), 3.74(s, 1H),      5.58(s, 1H),  76.29 6.81  9.38    EtOAc,    7.13(d, J=12Hz, 1H), 7.46(d,         then    J=12Hz, 1H), 7.3-7.43(m, 10H),    chrom    9.08(s, 1H),      10.76(s, 1H)  32 4-Ph C chrom, 312 mg 180-2 433 (M+) CDCl3 4.02(d,      J=6Hz, 1H), 5.60 C28H23N3O2 76.94 5.50  9.97    then, 17%   (d, J=6Hz,      1H), 7.2-7.56(m, 20H),  76.86 5.39  9.96    EtOAc:    9.4(br s, 1H)      hexane  33 4-OMe A EtOAc: 1.9 g 154-7 387 (M+) CDCl3 3.74(s, 3H),      3.96(d, J=6Hz, C23H21N3O3 71.30 5.46 10.85    hexane 79%   1H), 5.53(d,      J=6Hz, 1H), 6.74  70.71 5.67 10.71        (d, J=12Hz, 2H), 7.15(d,      J=12Hz,        2H), 6.9-7.43(m, 11H), 9.0(br s, 1H)       34 4-OEt A triturated 2.93 g  401 (M+) DMSO 1.31(t, J=7Hz, 3H), 3.73      C24H23N3O3 71.80 5.77 10.47    with PhMe 87%   (s, 1H), 3.97(q, J=7Hz,      2H), 5.55  72.05 5.89 10.21        (br s, 1H), 6.84(d, J=8Hz, 2H),       7.3-7.53(m, 12H), 8.99(br s, 1H),        10.72(br s, 1H)  35 4-OIPr B      triturated 1.34 g 178-80 415 (M+) CDCl3 1.27(d, J=8Hz, 6H), 3.93      C25H25N3O3 72.27 6.06 10.11    with Et2O 74%   (d, J=5Hz, 1H), 4.42(septe      t, J=6Hz,  72.25 6.04 10.06        1H), 5.54(d, J=5Hz, 1H), 6.72      (d, J=9Hz, 2H), 6.95(s, 1H), 7.05        (d, J=9Hz, 2H), 7.13-7.39(m,      11H)  36 4-OCH2CH2Ph B chrom 324 mg  477 (M+) DMSO 3.01(t, J=7Hz, 2H),      3.73 C30H27N3O3 75.45 5.70  8.80    (EtOAc: 31%   (s, 1H), 4.14(t,      J=7Hz, 2H), 5.55  75.71 5.78  8.67    hexane),    (br s, 1H), 6.86(d,      J=9Hz, 2H),    then triturated    7.18-7.52(m, 17H), 9.01(br s, 1H),      with PhMe    10.72(br s, 1H)  37 4-OPh A EtOAc: 2.9 g 188-90 450 (M + 1)      DMSO 3.75(s, 1H), 5.59(s, 1H), C28H23N3O3 74.82 5.16  9.35    CH3OH 68%       6.95-7.56(m, 19H), 9.21(s, 1H),  74.58 5.22  9.34        10.8(s, 1H)      38 4-SMe A EtOAc: 1.6 g 160-2 403 (M+) CDCl3 2.42(s, 3H), 4.0(d, J=6Hz,      C23H21N3O2S 68.46 5.25 10.41    hexane 65%   1H), 5.54(d, J=6Hz, 1H),      6.95-  68.28 5.28 10.25        7.44(m, 15H), 8.98(br s, 1H)  39 3-CF3 A      EtOAc: 3.0 g 165-7 425 (M+) DMSO 3.8(s, 1H), 5.58(s, 1H), C23H18F3N3O2      64.94 4.27  9.88    hexane 83%   7.3-7.56(m, 12H), 7.82(d, 1H),  65.07      4.19  9.77        7.98(s, 1H), 9.54(s, 1H), 10.88(s, 1H)  40 3-NO2 A      EtOAc: 2.11 g 164-6 (no M+) CDCl3 4.03(d, J=6Hz, 1H), 5.62 C22H18N4O4      65.57 4.51 13.92    hexane 84%   (d, J=6Hz, 1H), 7.2-8.1(m, 14H)  65.53      4.25 13.67  41 3-Me A CH3OH 1.05 g 188-90 371 (M+) DMSO 3.3(s, 3H),      3.74(s, 1H), C23H21N3O2 74.37 5.70 11.31     46%   5.57(s, 1H), 6.8-7.54(      m, 12H),  74.17 5.63 11.04        9.04(s, 1H), 10.86(s, 1H)  42 3-OMe A      EtOAc: 2.1 g 163-5 387 (M+) CDCl3 3.7(s, 3H), 3.98(d, J=6Hz, C23H21N3O3      71.30 5.46 10.85    hexane 51%   1H), 5.54(d, J=6Hz, 1H), 6.56-  71.29      5.72 10.59        7.48(m, 16H)  43 3-OIPr B C6H6: 450 mg  80-85 415 (M+)      CDCl3 1.26(d, J=6Hz, 6H), 3.96 C25H25N3O3 72.27 6.06 10.11    hexane 22%        (d, J=5Hz, 1H), 4.45(septet, J=6Hz,  71.99 6.18  9.94        1H),      5.51(d, J=5Hz, 1H),        6.54-6.62(m, 2H), 6.91-7.08(m,        3H),      7.21-7.50(m, 11H)  44 3-OCH2Ph B triturated 1.64 g 143-44.5 463 (M+)      CDCl3 3.99(d, J=5Hz, 1H), 4.97 C29H25N3O3 75.14 5.44  9.07    with Et2O      85%   (s, 2H), 5.54(d, J=5Hz, 1H), 6.66-  75.01 5.49  8.84      6.68(m, 2H), 7.06(s, 1H), 7.09-        7.12(m, 2H), 7.23-7.44(m, 16H)      45 3-CF3, 4-Br B chrom 120 mg  503, 505 CDCl3 4.03(d, J=6Hz, 1H), 5.58      C23H17BrF3N3O2 54.78 3.40  8.33     12%  (M+'s for Br d, J=6Hz, 1H),      7.2-7.56(m, 15H)  55.05 3.51  8.07       isotopes)  46 3,4-diCl A EtOAc:      2.2 g 169-71 425 (M+) CDCl3 4.04(d, J=6Hz, 1H), 5.57 C22H17C12N3O2 61.99      4.02  9.86    hexane 49%   (d, J=6Hz, 1H), 6.97-7.5(m, 15H)  62.22 4.11      9.75  47 3-Cl,4-F A EtOAc: 2.0 g 174-6 409 (M+) CDCl3 4.0(d, J=6Hz, 1H),      5.56(d, C22H17ClFN3O2 64.47 4.18 10.25    hexane 84%   J=6Hz, 1H),      6.95-7.5(m, 15H)  64.03 4.76  9.53  48 3-NO2,4-Cl A EtOAc: 910 mg 149-51      536 (M+) CDCl3 4.03(d, J=6Hz, 1H), 5.58 C22H17ClN4O4 60.49 3.92 12.83      hexane 41%   (d, J=6Hz, 1H), 7.2-7.82(m, 14H),  60.23 4.03 12.79      9.3(s, 1H)  49 3,4-(CH2)3 B EtOAc: 380 mg 179-81 397 (M+) DMSO 1.97(m,      2H), 2.8(m, 4H), C25H23N3O2 75.55 5.83 10.57    hexane, 12%   3.7(s,      1H), 5.58(s, 1H), 7.12-7.5  75.67 5.95 10.46    then chrom    (m, 13H),      9.0(s, 1H), 10.75(s, 1H)    (EtOAc: hexane),    then EtOAc       50 3,4-(CH2)4 D chrom 354 mg 177-8.5 411 (M+) CDCl3 1.74(t, J=3Hz, 4H),      2.66 C26H25N3O2 75.89 6.12 10.21    (EtOAc: 20%   (d, J=7Hz, 4H),      3.97(d, J=5Hz,  76.08 6.33 10.05    CH2Cl2),    1H), 5.55(d, J=5Hz, 1H),      6.83-    then Et2O:    6.92(m, 3H), 6.98(s, 1H), 7.24-    CH2Cl2      7.44(m, 10H), 9.06(br s, 1H)  51 3,4-DiOMe B chrom 640 mg  418 (M + 1)      CDCl3 3.74(s, 3H), 3.82(s, 3H), C24H23N3O4 69.05 5.55 10.07     11%      3.97(d, J=6Hz, 1H), 5.58(d, J=6Hz,  68.92 5.54 10.12        1H),      6.53-7.5(m, 14H), 8.7(s, 1H)  52 3,4-OCH2O B EtOAc 390 mg 179-81 401      (M+) DMSO 3.73(s, 1H), 5.55(s, 1H), C23H19N3O4 68.82 4.77 10.47     7%      5.97(s, 2H), 6.8-7.6(m, 13H),  68.96 4.76 10.29        9.05(s, 1H),      10.75(s, 1H)  53 2-CF3 A EtOAc 3.46 g 143-5 425 (M+) DMSO 3.8(s 1H),      5.6(s, 1H), 7.2- C23H18F3N3O2 64.94 4.26  9.88     77%   7.75(m, 14H),      8.68(s, 1H), 10.95  65.15 4.19  9.60        (s, 1H)  54 2,3-diCl A THF:      3.9 g 191-3 425 (M+) DMSO 3.78(s, 1H), 5.54(s, 1H), C22H17Cl2N3O2 61.93      4.02  9.86    hexane 70%   7.3-7.6(m, 13H), 8.88(s, 1H),  62.00 3.96      9.94        11.05(s, 1H)  55 2,4-diCl A EtOAc: 1.7 g 150-3 425 (M+)      CDCl3 4.02(d, J=6Hz, 1H), 5.38 C22H17Cl2N3O2 61.98 4.02  9.86    hexane      63%   (d, J=6Hz, 1H), 7.15-7.5(m, 13H),  62.16 4.28  9.96        8.1(d,      J=10Hz, 1H), 8.95(s, 1H)  56 2,4-diF A chrom 800 mg  393 (M+) CDCl3      4.03(d, J=6Hz, 1H), 5.43 C22H17F2N3O2     32%   (d, J= 6Hz, 1H), 6.8(m,      2H), 6.91        (s, 1H), 7.2-7.5(m, 9H), 7.93(m,        1H), 8.8(br s,      1H)  57 2-Cl,5-CF3 A EtOAc: 1.38 g 130-2 459 (M+) CDCl3 4.05(d, J=6Hz,      1H), 5.41 C23H17ClF3N3O2 60.07 3.73  9.14    hexane 29%   (d, J=6Hz,      1H), 7.2-7.5(m, 14H),  60.37 3.95  9.03        8.53(s, 1H)  58 3,5-diCF3      A chrom 3.6 g  493 (M+) CDCl3 4.03(d, J=6Hz, 1H), 5.62 C24H17F6N3O2      58.42 3.47  8.52     69%   (d, J=6Hz, 1H), 7.2-7.58(m, 13H),  58.59 3.75       8.69        7.75(s, 2H)  59 3,5-diCl A EtOAc: 800 mg 166-8 425 (M+)      DMSO 3.82(s, 1H), 5.54(s, 1H), C22H17Cl2N3O2 61.99 4.02  9.86    hexane      30%   7.2(s, 1H), 7.15-7.5(m, 10H), 7.71  61.75 3.94  9.65        (s,      2H), 9.5(s, 1H), 10.95(s, 1H)       ##STR9##         60 H A (THF) PhMe: hexane 117 mg  69-79 373 (M+) CDCl3 4.03(d, 1H),      5.77(d, 1H), C22H19N3OS.C4H10O 69.77 6.53  9.39    then Et2O: 5%      7.10-7.54(m, 16H), 9.6(br s, 1H)  69.72 6.38  9.37    hexane (to give      [plus for Et2O: 1.20(t, 6H), 3.48    Et2O solvate)    (q, 4H)]  61 3-CF3      A chrom 1.5 g  442 (M + 1) CDCl3 4.07(d, J=6Hz, 1H), 5.82 C23H18F3N3OS      62.58 4.11  9.52     33%   (d, J=6Hz, 1H), 7.12-7.63(m, 16H)  62.87 4.22       9.34  62 4-CF3 A PhMe 800 mg  87-90 441 (M+), CDCl3 4.09(d, J=6Hz, 1H),      5.77 C23H18F3N3OS 62.51 4.11  9.52     29%  442 (M + 1) (d, J= 6Hz, 1H),      7.16(d, J=9Hz,  62.51 4.15  9.46        1H), 7.2-7.28(m, 3H), 7.3-7.44           (m, 7H), 7.44-7.64(m, 5H)  63 3-CF3,4-Cl A chrom, then 200 mg  80-2      475 (M+), CDCl3 4.09(d, J=6Hz, 1H), 5.83 C23H17ClF3N3OS 58.05 3.60  8.83         triturated with 10%  476 (M + 1) (d, J=6Hz, 1H), 7.06-7.6(m, 15H)      58.15 3.62  8.55    hexane  64 2,3-diCl A EtOAc: 2.5 g 154-6 441 (M+),      DMSO 3.95(s, 1H), 6.16(s, 1H), C22H17Cl2N3Os 59.73 3.87  9.50    hexane      67%  442, 444 7.2-7.6(m, 13H), 9.5(br s, 1H),  59.92 4.11  9.73       (M      + 1's for 11.5(br s, 1H)       Cl isotopes)  65 pentaF A chrom 600 mg      463 (M+) CDCl3 4.04(d, J=5Hz, 1H), 5.82 C22H14F5N3OS     21%   (s, 1H),      6.94(s, 1H), 7.2-7.55(m, 11H)            Analysis, % Method Solvent Yield, Mp, Theory/Found Ex. R R' of      Prep. of Cryst..sup.a % °C. MS 1HNMR Formula C H N       ##STR10##         66 2,3-diCl Me A EtOAc: 670 mg 172-4 439 (M+) DMSO 3.35(s, 3H),      3.88(s, 1H), 5.50(s, 1H), C23H19Cl2N3O2 62.74 4.35  9.54     hexane 76%       7.16-7.56(m, 13H), 9.26(s, 1H)  62.55 4.26  9.37  67 4-CF3 Me A chrom      210 mg  439 (M+) CDCl3 3.36(s, 3H), 3.93(d, J=3Hz, 1H), 5.54(d, C24H20F3N      3O2 65.60 4.59  9.56      40%   J=3Hz, 1H), 6.92(s, 1H), 7.15-7.6(m,      14H)  65.35 4.51  9.30       ##STR11##         68 2,3-diCl Ph A EtOAc 170 mg 172-3 425 (M+) DMSO 2.5(m, 1H), 3.53(m,      1H), 5.72(s, C22H17Cl2N3O2 61.96 4.02  9.86      63%   1H), 7.3-7.76(m,      11H), 7.95(s, 1H), 8.58  62.20 4.04  9.94         (s, 1H), 10.6(br s,      1H)       ##STR12##         69 4-Br n-Bu A chrom 670 mg  415, 417 DMSO 0.84(t, J=12Hz, 3H),      1.30(m,  C20H22BrN3O2      56%  (M+'s for Br 2H), 1.46(m, 2H), 1.65(m,      2H), 3.29(s,        isotopes) 1H), 5.38(s, 1H), 7.2-7.6(m, 9H), 9.17          (s, 1H), 10.34(s, 1H)       ##STR13##         70 3-CF3 n-Bu A chrom 290 mg  405 (M+) CDCl3 0.93(t, J=12Hz, 3H),      1.42(m, C21H22F3N3O2 62.21 5.47 10.36      21%   2H), 1.5(m, 2H),      1.73(m, 1H), 1.83(m,  62.40 5.66 10.26         1H), 3.79(s, 1H), 4.83(m,      1H), 7.2-7.6         (m, 9H), 7.74(s, 1H), 7.83(s, 1H)  71 4-CF3 n-Bu A      chrom 136 mg 152-5 405 (M+) CDCl3 0.95(t, J=8Hz, 3H), 1.42(m, C21H22F3N3O      2 62.21 5.47 10.36      15%   2H), 1.51(m, 2H), 1.72(m, 1H), 1.88  61.97      5.56 10.22         (m, 1H), 3.53(s, 1H), 4.82(t, J=8Hz,         1H),      7.18-7.35(m, 5H), 7.44(ABq, J=8Hz,         Δν=18Hz, 4H),      7.65(s, 1H), 8.55         (νbr s, 1H)  72 4-Br CH2Ph A EtOAc: 248 mg      449, 451 DMSO 2.97-3.15(m, 2H), 3.47(br s, C23H20BrN3O2 61.34 4.48  9.33          hexane 51%  (M+'s for Br 1H), 4.70(br s, 1H), 7.01(d, J=8Hz,  61.16      4.73  9.12        isotopes) 2H), 7.15-7.42(m, 12H), 9.05(br s, 1H),         10.47(br s, 1H)  73 4-Br i-Pr A chrom 45 mg  401, 403, CDCl3 1.12(d,      J=6Hz, 6H), 2.05(m, C19H20BrN3O2     (EtOAc: 42%  (M+'s for Br J=7Hz,      1H), 3.64(s, 1H), 4.56(d, J=8Hz,     hexane)   isotopes) 1H), 7.20-      7.51(m, 9H), 8.28(br s, 1H)            Analysis, % Method Solvent Yield, Mp, Theory/Found Ex. R X of      Prep. of Cryst..sup.a % °C. MS 1HNMR Formula C H N       ##STR14##         74 4-CF3 -- E (Et3N) .sup.c 100 mg  72-5 410 (M+) CDCl3 3.89(d,      J=4Hz, 1H), 5.16(br s, C23H17F3N2O2 67.31 4.18  6.83      6%   1H),      7.18-7.26(m, 5H), 7.26-7.50(m,  67.57 4.45       6.64         8H), 7.50-7.57(m, 2H)  75 3,4-diCl -- E (no base) .sup.c      508 mg       68-70 410, 412 CDCl3 3.89(d, J=4Hz, 1H), 5.18(br s, C22H16Cl2N2O2 64.25      3.92  6.81      29%  (M+'s for Cl 1H), 7.14-7.48(m, 14H)  64.21 3.99      6.60        isotopes)  76 3-CF3 CH2 E chrom 600 mg  424 (M+) CDCl3      3.47(s, 2H), 3.94(s, 1H), 5.30 C24H19F3N2O2 67.92 4.51  6.60      17%      (s, 1H), 7.0-7.8(m, 14H)  67.76 4.56  6.79  77 4-CF3 CH2 E (no base)      .sup.c 101 mg  66-68 424 (M+) CDCl3 3.48(br s, 2H), 3.91(d, J=4Hz,      C24H19F3N2O2 67.92 4.51  6.60      6%   1H), 5.28(br s, 1H), 7.04-7.5(m,      15H)  67.78 4.56  6.45  78 3,4-diCl CH2 E (Et3N) Et2O: 1.0 g  70-72 426      (M+) CDCl3 3.36(br s, 2H), 3.93(d, J=5Hz, C23H18Cl2N2O2 64.95 4.27  6.58          hexane 17%   1H), 5.27(br s, 1H), 6.84(br s, 1H), 7.0  64.93 4.67      6.60         (br s, 1H), 7.08-7.5(m, 12H)  79 H O F EtOAc: 980 mg 164-6      358 (M+) CDCl3 3.97(d, J= 6Hz, 1H), 5.54(d, C22H18N2O3 73.73 5.06  7.82         hexane 43%   J=6Hz, 1H), 6.9-7.5(m, 16H)  73.94 5.29  7.88  80 4-NO2      O F EtOAc 1.3 g 175-7 403 (M+) CDCl3 4.02(d, J=6Hz, 1H), 5.52(d,      C22H17N3O5 65.51 4.25 10.42      32%   J=6Hz, 1H), 7.1-7.5(m, 12H),      8.19(d,  65.49 4.31 10.34         J=15Hz, 2H), 9.25(br s, 1H)  81 4-Br S      B EtOAc: 610 mg 156-7 452, 454 CDCl3 3.97(d, J=4Hz, 1H), 5.58(d,      C22H17BrN2O2S 58.29 3.78  6.18     hexane 13%  (M+'s for Br J=4Hz, 1H),      7.25-7.55(m, 14H), 9.15  58.04 3.79  6.07        isotopes) (br s, 1H)       ##STR15##         82 3-CF3  NH N chrom 1.72 g  425 (M+) CDCl3 4.22(d, J=12Hz, 1H), 4.82 C      23H18F3N3O2        (CH2Cl2) 48%   (dd, J=9Hz, 12Hz, 1H), 5.46(d, J=9Hz,             1H), 7.18-7.75(m, 13H), 7.84(s,         1H), 10.35(s, 1H)  83      4-CF3 NH N chrom 530 mg  74-6 425 (M+) CDCl3 4.23(d, J=12Hz, 1H), 4.82      C24H18F3N3O2 64.94 4.27  9.88     (CH2Cl2), then 30%   dd, J=9, 12Hz,      1H), 5.44(d, J=9Hz,  65.11 4.41  9.65     triturated with    1H),      7.18-7.24(m, 2H), 7.3-7.42(m,     hexane    8H), 7.56-7.7(m, 4H),      10.4(br s, 1H)       ##STR16##         84 H S O (C6H6) Et2O 233 mg 186-8 371 (M+) CDCl3 4.05(d, 1H), 5.23(d,      1H), 7.15- C22H17N3Os 71.14 4.61 11.31      42%   7.68(m, 15H)  71.38      4.89 11.11  85 6-Br S O (PhMe) Et2O: 1.67 g 180-6 449, 451 CDCl3 4.06(d,      J=7Hz, 1H), 5.24(d, C22H16BrN3OS 58.67 3.58  9.33     hexane 57%  (M+'s      for Br J=7Hz, 1H), 7.16-7.52(m, 13H), 7.64  58.87 3.83  9.08      isotopes) (d, J=1Hz, 1H)  86 4,5-diCl S O (PhMe) Et2O: 1.10 g 200-4 440      (M + 1 for CDCl3 4.13(d, J=8Hz, 1H), 5.19(d, C22H15Cl2N3OS 60.01 3.43      9.54     hexane 83%  Cl isotopes) J=8Hz, 1H), 7.18-7.45(m, 13H)  60.30      3.70  9.62  87 H O O (PhMe) Et2O 660 mg 174-5.5 355 (M+) CDCl3 4.04(d,      J=4.5Hz, 1H), 5.60(d, C22H17N3O2 74.35 4.82 11.82      62% 5.5  J=4.5Hz,      1H), 7.14-7.54(m, 15H)  74.56 4.98 11.67            Analysis, % Method Solvent Yield, Mp, Theory/Found Ex. R of Prep.      of Cryst..sup.a % °C. MS 1HNMR Formula C H N       ##STR17##        Structure for examples 88-108 below  88 3-Pyridyl C precipitated 3.5 g 2      08-10 358 (M+) DMSO 3.8(s, 1H), 5.54(s, 1H), 7.27- C21H18N4O2 70.38 5.06 1      5.63    from reaction 73%   7.5(m, 11H), 7.94(m, 1H), 8.23(m,  70.34      5.16 15.35    mixture    1H), 8.7(m, 1H), 9.38(br s, 1H),      10.94(br s, 1H)  89 4-Pyridyl C chrom 183 mg  358 (M+ ) CDCl3 3.93(d,      J=6Hz, 1H), 5.46(d, C21H18N4O2     28%   J=6Hz, 1H), 7.18-7.35(m, 10H),      7.62        (d, J=10Hz, 2H), 7.95(d, J=10Hz, 2H)  90 1-Naphthyl A EtOAc:      790 mg 145-7 407 (M+) CDCl3 4.03(d, J=6Hz, 1H), 5.51(d, C26H21N3O2 76.64      5.19 10.31    hexane 33%   J=6Hz, 1H), 6.8-7.8(m, 18H), 9.0(br s,  76.41      5.33 10.12        1H)  91 2-Naphthyl A EtOAc: 1.13 g 172-4 407 (M+)      CDCl3 4.02(d, J=6Hz, 1H), 5.60(d, C26H21N3O2 76.64 5.19 10.31    hexane      44%   J=6Hz, 1H), 7.1-7.9(m, 18H), 9.38  76.83 5.27 10.26        (br s,      1H)  92 3-Quinolinyl D THF: 157 mg 244-6.5 409 (M+) DMSO 3.81(s, 1H),      5.57(s, 1H), C25H20N4O2 73.51 4.93 13.71    PhMe 12%   7.29-7.62(m,      12H), 7.85(d, J=8Hz,  73.48 4.74 13.55    (came out of    1H), 7.91(d,      J=8Hz, 1H), 8.44(d,    reaction    J=2Hz, 1H), 8.97(d, J=2Hz, 1H),      mixture)    9.62(br s, 1H), 11.00(br s, 1H)  93 6-Quinolinyl D CH3CN:      224 mg 222-5 408 (M+) DMSO 3.79(s, 1H), 5.58(s, 1H), C25H20N4O2 73.51      4.94 13.72    PhMe 32%   7.25-7.49(m, 11H), 7.85-7.93(m,  73.68 5.09      13.57        2H), 8.14(d, J=1.4Hz, 1H), 8.20(d,        J=8Hz, 1H),      8.74(dd, J=1.4, 4.3Hz,        1H), 9.45(br s, 1H), 10.95(br s, 1H)  94      n-Bu A chrom 2.68 g  337 (M+) DMSO 0.86(t, J=10Hz, 3H), 1.15(m, C20H23N3O      2 71.19 6.87 12.45     76%   2H), 1.38(m, 2H), 3.08(m, 2H), 3.62  71.33      6.71 12.27        (s, 1H), 5.47(s, 1H), 7.18(s, 1H),        7.3-7.46(m,      10H), 10.52(s, 1H)  95 c-Hexyl A EtOAc: 1.9 g 152-4 363 (M+) CDCl3      0.8-1.84(m, 10H), 3.6(m, 1H), C22H25N3O2 72.70 6.93 11.56    hexane 83%       3.89(d, J=6Hz, 1H), 4.98(d, J=12Hz,  72.59 7.03 11.30        1H),      5.42(d, J=6Hz, 1H), 7.2-        7.45(m, 10H), 8.66(s, 1H)  96 CH2Ph A      chrom 2.6 g  371 (M+) CDCl3 3.86(d, J=6Hz, 1H), 4.31 C23H21N3O2 74.37      5.70 11.31     67%   (dABq, J=8Hz, Jab=20Hz, Δν=36Hz,  74.11      5.77 11.12        2H), 5.50(m, 1H), 5.51(d, J=6Hz,        1H), 7.07-7.43(      m, 16H)  97 CH2Ph(NMe) M chrom 380 mg  385 (M+) CDCl3 2.65(s, 3H),      3.66(d, J=2Hz, C24H23N3O2    (EtOAc: 39%   1H), 4.38(ABq, J=20Hz,      Δν=72Hz,    hexane)    2H), 4.94(d, J=2Hz, 1H), 6.9(m, 2H),         7.15-7.46(m, 13H), 7.9(br s, 1H)  98 CH2Ph-2-Cl M chrom 149 mg  405      (M+) CDCl3 3.92(d, J=7Hz, 1H), 4.4(m, C23H20ClN3O2 68.06 4.97 10.35      15%   2H), 5.39(d, J=7Hz, 1H), 5.55(t, J=6Hz,  68.30 5.13 10.01      1H), 7.15-7.43(m, 14H), 8.48(br s, 1H)  99 CH2Ph-3-Cl C EtOAc: 750 mg      133-6 405 (M+) CDCl3 3.88(d, J=6Hz, 1H), 4.26 C23H20ClN3O2 68.08 4.97      10.35    hexane 29%   (dABq, J=7Hz, Jab=17Hz, Δν=48Hz,  67.78      5.07 10.46        2H), 5.48(d, J=6Hz, 1H), 5.57(t,        J=7Hz, 1H),      6.94-7.43(m, 14H), 8.9        (br s, 1H) 100 CH2Ph-4-Cl A EtOAc: 182 mg      124-7 405 (M+) CDCl3 3.89(d, J=5Hz, 1H), 4.27 C23H20ClN3O2 68.06 4.97      10.35    hexane 30%   (dABq, J=6Hz, Jab=12Hz, Δν=42Hz,  68.22      5.09 10.15        2H), 5.48(t, J=6Hz, 1H), 5.50(d,        J=5Hz, 1H),      6.98-7.44(m, 14H), 8.52        (br s, 1H) 101 CH(Me)Ph (S) A chrom 900      mg  385 (M+) CDCl3.sup.e 1.32(q, J=9Hz, 3H), 3.90 C24H23N3O2 74.78 6.01      10.90  (1:1 mixture of   34%   (dd, J=5Hz, 9Hz, 1H), 4.90(q, J=8Hz,      75.04 6.10 10.94  diastereomers -      1H), 5.37(dd, J=9Hz, 36Hz, 1H),      each optically      5.45(t, J=5Hz, 1H), 7.0-7.44(m,  active).sup.d      15H, 8.53(br s, 1H) 102 CH(Me)Ph (R) A chrom 172 mg  385 (M+) DMSO.sup.e      1.20(t, J=6Hz, 3H), 3.60(s, C24H23N3O2  (1:1 mixture of   7%   1/2H),      3.66(s, 1/2H), 4.83(m, 1H),  diastereomers -      5.43(s, 1/2H), 5.52(s,      1/2H), 7.2-  each optically      7.55(m, 15H), 10.58(s, 1H)  active).sup.      f 103 CH(Me)Ph-4-Br (+/-) A EtOAc: 670 mg 145-7 463, 465 DMSO 1.41(d,      J=8Hz, 3H), 3.62(s, C24H22BrN3O2 62.08 4.78  9.05  (single diastereomer      hexane 33%  (M+'s for 1H), 4.76(m, 1H), 5.42(s, 1H), 7.2-  62.27 4.75      8.95  obtained in     Br isotopes) 7.62(m, 15H), 10.56(s, 1H)  crystalliz      ation).sup.g 104 CH(Me)-1-Naphthyl (R) A chrom 137 mg  435 (M+) CDCl3      (peaks for major isomer visible C28H25N3O2  (c. 3:1 mixture of   12%      in plot)1.5(d, J=9Hz, 3H), 3.86(d,  diastereomers - each      J=6Hz,      1H), 5.48(d, J=6Hz, 1H),  optically active).sup.h      5.74(m, 1H),      7.06-8.19(m, 19H) 105 CH2CH2Ph A chrom 720 mg  385 (M+) CDCl3 2.68(m,      2H), 3.42(m, 2H), C24H23N3O2 74.78 6.01 10.90     30%   3.86(d, J=6Hz,      1H), 4.94(t, J=5Hz,  74.49 6.15 10.74        1H), 5.27(d, J=6Hz, 1H),      6.95-7.44        (m, 15H) 106 CH2CH2Ph-2-Cl C chrom 2.2 g  419 (M+)      CDCl3 2.82(m, 2H), 3.45(m, 2H), C24H22ClN3O2 68.65 5.28 10.01     63%      3.85(d, J=7Hz, 1H), 5.02(t, J=6Hz,  68.86 5.36 10.01        1H), 5.25(d,      J=7Hz, 1H), 6.95-7.4        (m, 14H), 8.58(br s, 1H) 107 CH2CH2Ph-4-Cl C      chrom 1.5 g  419 (M+) CDCl3 2.63(m, 2H), 3.40(m, 2H), C24H22ClN3O2 68.65      5.28 10.01     66%   3.86(d, J=8Hz, 1H), 4.83(t, J=6Hz,  68.84 5.36      9.76        1H), 5.22(d, J=8Hz, 1H), 6.88-7.42        (m, 14H), 8.45(br      s, 1H) 108 CH2CH2CH2Ph D chrom 239 mg  399 (M+) CDCl3 1.70(pentet,      J=7Hz, 2H), 2.48 C25H25N3O2 75.16 6.31 10.52    (EtOAc: 48%   (t, J=7Hz,      2H), 3.18(m, 2H), 3.89(d,  74.89 6.28 10.27    hexane)    J=6Hz, 1H),      4.92(br t, J=6Hz, 1H),        5.35(d, J=6Hz, 1H), 7.02-7.46(m,      15H), 8.25(br s, 1H)       ##STR18##            Analysis, % Method Solvent Yield, Mp, Theory/Found Example of      Prep. of Cryst..sup.a % °C. MS 1HNMR Formula C H N        109 B chrom 75 mg 160- 6 397 (M+) CDCl3 2.58-2.82(m, 2H), 3.37-3.48(m,      1H), 3.54-3.62(m, 1H), 3.64(d, J=2, 1H), C25H23N3O2    4%   4.37(d,      J=3.5, 2H), 4.95(d, J=2, 1H), 6.78(m, 1H), 7.02-7.46(m, 13H), 8.18(br s,      1H)       ##STR19##        Structure for examples 110-133A below     Analysis, % Meth. Solvent      Yield, Mp, Theory/Found Ex. R1 R2 R3 Prep. of Cryst..sup.a % °C.      MS 1HNMR Formula C H N        110 4-CF3 2-Cl H A EtOAc 185 mg  459 (M+) DMSO 3.57(br s, 1H), 5.72(br      s, C23H17ClF3N3O2 60.07 3.73  9.14       19%   1H), 7.14-7.82(m, 13H),      59.85 3.80  8.82          9.72(br s, 1H), 11.01(br s, 1H) 111 4-CF3 3-CN      H A triturated 1.80 g  450 (M+) DMSO 3.90(br s, 1H), 5.67(br s, C24H17F3N      4O2 64.00 3.80 12.44      with PhMe 88%   1H), 7.12-7.98(m, 13H),  64.09      3.98 12.26          9.63(br s, 1H), 10.83(br s, 1H) 112 4-CF3 3-OMe H A      chrom (2X 160 mg  455 (M+) CDCl3 3.82(s, 3H), 4.03(d, C24H20F3N3O3 63.29      4.43  9.23      with EtOAc: 9%   J=7Hz, 1H), 5.51(d, J=7Hz,  63.00 4.36      9.03      hexane), then    1H), 6.92-7.00(m, 3H), 7.14-      triturated      with    7.50(m, 10H), ˜8.8(br s, 1H)      PhMe: hexane 113 4-CF3      4-N(Me)2 H A EtOAc: 95 mg  468 (M+) DMSO 2.90(s, 6H), 3.73(br s,      C25H23F3N4O2 64.10 4.95 11.96      hexane 32%   1H), 5.46(br s, 1H),      6.77(d,  64.26 5.18 11.71          J=8Hz, 2H), 7.23-7.40(m,      7H), 7.62(d, J=8Hz, 2H), 7.76          (d, J=8Hz, 2H), 9.42(br s,        1H), 10.81(br s, 1H) 114 4-Br 2-Cl H A PhMe, 47 mg  469, 471 DMSO      3.53(br s, 1H), 5.72(br C22H17BrClN3O2 56.13 3.64  8.94      then EtOAc:      10%  (M+'s for s, 1H), 7.12-7.60(m, 13H),  56.24 3.62  8.82      hexane       Br isotopes) 9.49(br s, 1H), 10.93(br s, 1H) 115 4-Br 2-OMe H A EtOAc:      52 mg  465, 467 CDCl3 3.72(s, 1H), 3.78(s, C23H20BrN3O3 59.24 4.32  9.01           hexane 17%  (M+'s for 3H), 5.50(br s, 1H), 6.87-7.04  59.46 4.23      8.90         Br isotopes) (m, 3H), 7.27-7.52(m, 10H),          9.29(br      s, 1H) 116 4-Br 2,3-diCl H A triturated 1.89 g  503, 505 DMSO 3.58(s,      1H), 5.65(s, C22H16BrCl2N3O2.1/2 CH2Cl2 49.35 3.13  7.67  (trans)      with Et2O, 69%  (M+'s), 1H), 5.70(s, 2H for  49.60 3.25  7.78      then      CH2Cl2:   506, 508 1/2CH2Cl2), 7.28-7.46(m, 12H),      hexane (to give)       (M + 1's for 9.43(br s, 1H), 10.91(br s, 1H)      CH2Cl2   Cl, Br      hemisolvate)   isotopes) 117 4-Br 2,3-diCl H A CH2Cl2 76 mg 198-205 503,      505, DMSO 5.04(d, J=10Hz, 1H), C22H16BrCl2N3O2 52.31 3.19  8.32  (cis)       (2X) 54%  507(M+'s 6.30(m, 1H), 6.72(d, J=7Hz,  52.59 3.27  8.35       for Cl, Br 2H), 7.00-7.12(m, 3H), 7.30-         isotopes) 7.60(m, 7H),      9.31(br s, 1H),          10.70(br s, 1H) 118 4-Br 3-CONH2 H A CH3CN 237      mg 210-3 479, 481 DMSO 3.78(s, 1H), 5.55(s, C23H19BrN4O3 57.63 4.00      11.69       45%  (M + 1's for 1H), 7.25-7.59(m, 12H), 7.80  57.57 3.96      11.66         Br isotopes) (d, J=8Hz, 1H), 7.94(d, J=24Hz,          2H),      9.28(s, 1H), 10.78(br s, 1H) 119 4-Br 4-NO2 H A EtOAc: 343 mg  480, 482      DMSO 3.88(br s, 1H), 5.69(br s, C22H17BrN4O4 54.90 3.56 11.64      PhMe      60%  (M+'s for 1H), 7.30-7.53(m, 9H), 7.76  55.15 3.64 11.55         Br      isotopes) (br d, J=7Hz, 2H), 8.31(d, J=8Hz,          2H), 9.39(br s,      1H), 10.93          (br s, 1H) 120 3-CF3, 2-Cl H A EtOAc: 604 mg  493,      495 DMSO 3.58(br s, 1H), 5.72 C23H16Cl2F3N3O2 55.89 3.26  8.50  4-Cl      hexane 44%  (M+'s for (br s, 1H), 7.30-7.50(m, 7H),  55.85 3.21  8.43           Br isotopes) 7.58-7.67(m, 3H), 7.93(d, J=9Hz,          1H), 8.15(br      s, 1H), 9.83          (br s, 1H), 11.04(br s, 1H) 121 4-i-Pr 2-Cl H A      EtOAc: 514 mg  434 (M + 1) DMSO 1.18(d, J=7Hz, 6H), C25H24ClN3O2 69.20      5.58  9.68      hexane 43%   2.84(m, J=7Hz, 1H), 3.51(br s,  69.00 5.55      9.73          1H), 5.74(br s, 1H), 7.14-          7.64(m, 13H), 9.27(br      s, 1H),          10.88(br s, 1H) 122 4-Br H 2-Cl A EtOAc 750 mg 182-2.5      470 (M + 1) DMSO 4.16(br s, 1H), 5.66(br s, C22H17BrClN3O2 56.13 3.64      8.93       43%   1H), 7.48-7.88(m, 13H),  56.35 3.62  8.92      9.56(br s, 1H), 11.26(br s, 1H) 123 4-Br H 3-OMe A EtOAc: 520 mg 154-5      467 (M+) CDCl3 3.72(s, 3H), 4.94(d, C23H20BrN3O3 59.24 4.32  9.01      hexane 30%   J=6Hz, 1H), 5.57(d, J=6Hz,  59.44 4.39  9.06          1H),      6.74-6.88(m, 3H), 7.04-          7.32(m, 7H), 7.42(br s, 4H),      9.2(br s, 1H) 124 4-Br H 3-O-i-Pr A Et2O: 2.24 g 148-51 493, 495 CDCl3      1.22(t, J=6Hz, 6H), C25H24BrN3O3 60.74 4.89  8.50      hexane 91%  (M+'s      for 3.90(d, J=4.5Hz, 1H), 4.43  60.53 4.94  8.70         Br isotopes)      (septet, J=6Hz, 1H), 5.58(d,          J=4.5Hz, 1H), 6.74-6.82(m,       3H), 7.08(dd, J=2, 9Hz, 2H),          7.19-7.29(m, 5H), 7.36-7.42         (m, 5H) 125 4-Br H 3-NO2 A CH2Cl2: 1.32 g 150-1.5 480, 482 DMSO      4.05(s, 1H), 5.61(s, C22H17BrN4O4 54.90 3.56 11.64      hexane 48%      (M+'s for 1H), 7.27-7.52(m, 9H), 7.66(t,  54.63 3.67 11.74         Br      isotopes) J=8Hz, 1H), 7.82(d, J=8Hz,          1H), 8.16(d, J=8, 1H),      8.22(s,          1H), 9.34(br s, 1H), 10.95(br s,          1H) 126 4-Br      H 3-Cl A EtOAc: 232 mg 142-3 470 (M + 1) CDCl3 4.0(d, J=6Hz, 1H),      C22H17BrClN3O2 56.13 3.64  8.93      hexane 27%   5.46(d, J=6Hz, 1H),      6.87(br s,  56.21 3.76  8.84          1H), 7.0-7.12(m, 3H), 7.22-        7.54(m, 10H), 8.78(br s, 1H) 127 4-Br H 3-Br A chrom, then 128 mg      515, 517 CDCl3 3.94(brd, J=4Hz, 1H), C22H17Br2N3O2 51.29 3.33  8.16      triturated with 17%  (M+'s), 5.46(brd, J=4Hz, 1H), 7.04-  51.66 3.60      7.88      Et2O:   516 (M + 1 7.44(m, 15H)      hexane   for Br isotopes)      128 4-Br H 4-OMe A chrom 296 mg  467 (M+) CDCl3 3.78(s, 3H), 3.95(d,      C23H20BrN3O3 59.24 4.32  9.01      (EtOAc), 34%   J=6Hz, 1H), 5.49(d,      J=6Hz,  59.30 4.53  8.78      then triturated    1H), 6.85(d, J=12Hz,      2H),      with hexane    7.0-7.18(m, 5H), 7.24-7.5(m,          7H),      9.1(br s, 1H) 129 4-Br H 4-Cl A triturated 1.92 g 172-4.5 469, 471, 473      DMSO 3.78(s, 1H), 5.49(s, C22H17ClBrN3O2 56.13 3.64  8.93      with Et2O      82%  (M+'s), 1H), 7.28-7.50(m, 13H), 9.22  56.03 3.57  9.02         470      (M + 1 (br s, 1H), 10.84(br s, 1H)         for Cl, Br         isotopes)      130 4-CF3 H 2-Cl A triturated 260 mg 178-9 459 (M+) CDCl3 4.4(d, J=6Hz,      1H), C23H17ClF3N3O2 60.07 3.73  9.14      with 38%   5.58(d, J=6Hz, 1H),      7.2-7.54  60.07 3.77  9.18      EtOAc:    (m, 13H), 7.64(br s, 1H), 9.48           hexane    (br s, 1H) 131 3-CF3, H 2-Cl A triturated 250 mg 109-10      493 (M+) CDCl3 4.38(d, J=6Hz, 1H), C23H16Cl2F3N3O2 55.89 3.26  8.50      4-Cl    with 34%   5.6(d, J=6Hz, 1H), 7.16-7.66  55.60 3.24  8.45      EtOAc:    (m, 12H), 7.86(br s, 1H), 9.58      hexane    (br s, 1H) 132      4-i-Pr H 2-Cl A EtOAc: 200 mg 226-7 433 (M+) DMSO 1.16(d, J=7Hz, 6H),      C25H24ClN3O2 69.20 5.57  9.68      hexane 31%   2.82(m, 1H), 3.92(br s,      1H),  69.45 5.60  9.68          5.46(br s, 1H), 7.12(d, J=12Hz,      2H), 7.28-7.64(m, 11H),          9.14(br s, 1H), 10.98(br s, 1H) 133      4-Br 2-Cl 2-Cl A EtOAc: 4.32 g,  505 (M+) DMSO 4.02(br s, 1H), 5.75(br      s, C22H16BrCl2N3O2 52.30 3.19  8.32  (trans)    hexane 88%   1H),      7.28-7.58(m, 12H),  52.07 3.27  8.09          9.41(br s, 1H), 11.06(br      s, 1H) 133A 4-Br 2-Cl 2-Cl A EtOAc: 113 mg  505 (M+) DMSO 5.26(d, J=8Hz,      1H), C22H16BrCl2N3O2 52.31 3.19  8.32  (cis)   (THF) hexane 48%      6.20(br s, 1H), 6.36(d, J=9Hz,  52.23 3.32  8.47          1H), 6.85(t,      J=9Hz, 1H),          7.06-7.70(m, 10H), 9.34(br s,          1H),      10.74(br s, 1H)       ##STR20##            Analysis, % Meth. Solvent Yield, Mp, Theory/Found Ex. R  Ar1 Ar2      Prep. of Cryst..sup.a % °C. MS 1HNMR Formula C H N        134 4-Br Ph 1-Naphthyl A Et2O: 1.48 g 187-9 486, 488 CDCl3 4.70(d,      J=6Hz, 1H), 5.59 C26H20BrN3O2 64.21 4.15  8.64      hexane 61%  (M + 1's      (d, J=6Hz, 1H), 6.97(d, J=9Hz,  64.02 4.20  8.61         for Br 2H),      7.15-7.52(m, 12H), 7.70-         isotopes) 7.88(m, 3H), 9.10(br s, 1H)      135 4-Br 3-Pyridyl Ph A EtOAc 848 mg 184-87.5 437, 439 DMSO 3.84(s, 1H),      5.56(s, 1H), qC21H17BrN4O2 57.68 3.92 12.81      (2X), then 24% 87.5 (M      + 1's 7.23-7.46(m, 10H), 7.83(d, J=8Hz,  57.74 3.99 13.07      chrom,      for Br 1H), 8.53(dd, J=1.1, 4.5Hz,      then   isotopes) 1H), 8.65(d,      J=1.7Hz, 1H), 9.28      EtOAc    (s, 1H), 10.86(br s, 1H)      .sup.a Includes other methods of purification such as chromatography      (chrom), trituration, and precipitation, as indicated. If only solvents      are given, compound was purified by recrystallization from those solvents      For other methods of purification, solvents used follow in parentheses.      .sup.b After recrystallization from EtOAc:hexane.      .sup.c Purified by extraction into 1N NaOH, followed by acidification wit      1N HCl and extraction into organic solvent (Et2O or EtOAc). Evaporation o      solvent gave material homogeneous by TLC and of satisfactory purity.      .sup.d Prepared using S(-)-α-methylbenzylisocyanate.      .sup.e All splitting patterns reported are those apparent upon visual      inspection of plot, and reflect a combination of true protonproton      magnetic couplings, and multiplicity due to presence of a mixture of two      diasteromers.      .sup.f Prepared using R(+)-α-methylbenzylisocyanate.      .sup.g Prepared using (±)4-bromo-α-methylbenzylisocyanate.      .sup.h Prepared using (R)(-)-1-(1-naphthyl)ethylisocyanate.

EXAMPLE 136 1-[(2-Naphthyl)aminothiocarbonyl]-4,5-diphenyl-3-pyrazolidinone. [Method G].

2-Aminonaphthalene (2.95 g, 20.6 mmol) was dissolved in 230 mL CHCl₃ under nitrogen. Triethylamine (11.5 mL, 8.35 g, 82.5 mmol, 4.00 eq) was added and the mixture was cooled in an ice bath. Thiophosgene (3.30 mL, 43.3 mmol, 2.0 eq), dissolved in 90 mL CHCl₃, was added slowly over 1 hr. Stirring was continued for 2 hr at room temperature, then the mixture was partitioned between H₂ O and CHCl₃. The organic phase was separated, washed with H₂ O and two times with 1.0N HCl, then dripped through Na₂ SO₄ to remove water and evaporated in vacuo to yield 4.29 g (>100%) of a brown oil which solidified. NMR indicated the desired 2-naphthylisothiocyanate and contaminants: ¹ H NMR (CDCl₃) 7.30-7.85 (m, 7H).

4,5-Diphenyl-3-pyrazolidinone (1.00 g, 4.20 mmol) was dissolved in 10 mL THF under nitrogen and a solution of crude 2-naphthylisothiocyanate (obtained above; 0.93 g, c. 5.0 mmol, c. 1.2 eq) in 10 mL THF was added. After stirring overnight, TLC indicated the presence of unreacted pyrazolidinone, so more 2-naphthylisothiocyanate (0.39 g, c. 0.50 eq) was added in THF. After stirring an additional 1 hr, TLC still indicated some pyrazolidinone. After removal of solvent in vacuo, the residue was partially purified on two sequential silica columns (EtOAc:hexane with 0.5% HOAc). The material so obtained was dissolved in CHCl₃ and extracted three times with pH 10 buffer. The combined aqueous extracts were acidified with 1.0N HCl and then extracted three times with Et₂ O. The organic extracts were combined, dripped through Na₂ SO₄ to remove water, and evaporated in vacuo to obtain 0.60 g of material, which TLC indicated still contained impurities. The entire extractive procedure was then repeated (using CH₂ Cl₂ as the organic phase throughout), to afford 311 mg (17%) of a pale yellow foam:

¹ H NMR (CDCl₃) δ 4.11 (d, J=5 Hz, 1H), 5.73 (d, J=5 Hz, 1H), 7.26-7.56 (m, 13H), 7.67-7.82 (m, 4H), MS 423 (M+); titration pK_(a) 5.8. Analysis for C₂₆ H₂₁ N₃ OS: calculated C 73.73, H 5.00, N 9.92; found C 73.75, H 5.13, N 9.97.

                                      TABLE II                                     __________________________________________________________________________     PHYSICAL CHEMISTRY DATA ON CCK/GASTRIN ANTAGONISTS                              ##STR21##                                                                                                                           Analysis, %                         Method                                                                              Solvent                                                                              Yield,                                                                             Mp,                         Theory/Found             Ex.                                                                               R       of Prep.                                                                            of Cryst..sup.a                                                                      %   °C.                                                                        MS   1HNMR      Formula  C  H  N                  __________________________________________________________________________     137                                                                               3-Quinolinyl                                                                           G    triturated                                                                           1.23 g 424, 425                                                                            DMSO 3.99(s, 1H),                                                                         C25H20N4OS                                                                              70.73                                                                             4.75                                                                              13.20                              with PhMe                                                                            69%    (M+, 6.18(br s, 1H), 7.12-                                                                              70.52                                                                             4.86                                                                              12.98                                           M + 1)                                                                              7.52(m, 10H), 7.51(td,                                                         J=15, 2Hz, 1H), 7.60                                                           (td, J=15, 2Hz, 1H),                                                           7.98(t, J=15Hz, 2H),                                                           8.44(s, 1H), 8.98(d,                                                           J=3Hz, 1H), 10.22(br                                                           s, 1H), 11.96(br s, 1H)                      138                                                                               CH2Ph-3,4-diCl                                                                         G    chrom 1.38 g 456, 458                                                                            CDCl3 4.00(d,                                                                             C23H19Cl2N3OS                                                                           60.53                                                                             4.20                                                                               9.21                              (EtOAc:                                                                              69%    (M+'s                                                                               J=5Hz, 1H), 4.48(dd,                                                                               60.30                                                                             4.33                                                                               8.95                              hexane +     for Br                                                                              J=5, 17Hz, 1H), 4.76                                         HOAc)        isotopes)                                                                           (dd, J=7, 17Hz, 1H),                                                           5.65(d, J=5Hz, 1H),                                                            6.05(br s, 1H), 6.87(dd,                                                       J=2, 9Hz, 1H), 7.07-                                                           7.46(m, 12H), 9.45(br                                                          s, 1H)                                       __________________________________________________________________________      .sup.a Includes other methods of purification such as chromatography           (chrom), trituration, and precipitation, as indicated. If only solvents        are given, compound was purified by recrystallization from those solvents      For other methods of purification, solvents used follow in parentheses.  

PREPARATION 1 (R)-α-Methylbenzylphenylcarbonate.

(R)-α-Methylbenzyl alcohol (4.34 g, 35.5 mmol) was dissolved in 120 mL CH₂ Cl₂ under nitrogen and pyridine (4.31 mL, 1.5 eq) was added. The mixture was cooled in an ice bath and a solution of phenyl chloroformate in 30 mL CH₂ Cl₂ slowly added. After addition, the ice bath was removed and stirring continued overnight at room temperature. The mixture was partitioned between CH₂ Cl₂ and 1.0N HCl, then the organic layer separated, dripped through Na₂ SO₄ to remove water, and the solvent evaporated in vacuo to obtain 8.34 g of an oil, which was used without further purification (97% crude yield):

¹ H NMR (CDCl₃) δ 1.69 (d, J=7 Hz, 3H), 5.83 (q, J=7 Hz, 1H), 7.14-7.46 (m, 10H); MS 242 (M+);[α]_(D) =+119.6°, [α]₃₆₅ =+428.8° (c=1.02, MeOH). Analysis for C₁₅ H₁₄ O₃ : calculated C 74.36, H 5.82; found C 74.06, H 5.98.

EXAMPLE 139A/139B Diastereomers A and B of 1-[((R)-α-Methylbenzyl)oxycarbonyl]trans-4,5-diphenyl-3-pyrazolidinone.

(+)-trans-4,5-Diphenyl-3-pyrazolidinone (8.13 g, 34.2 mmol) was dissolved in 150 mL THF under nitrogen, cooled in an ice bath, and 1.43 g NaH (60% in mineral oil; hydride content 0.86 g, 35.7 mmol, 1.05 eq) was added. The mixture was stirred for 15 min at ice bath temperature and 30 min at room temperature. A solution of (R)-α-methylbenzylphenylcarbonate [from Preparation 1] (8.25 g, 34.1 mmol, 1.00 eq) in THF was then added over 10 min and the mixture stirred a further 40 min. After partitioning between Et₂ O and 1.0N HCl, the organic phase was separated, and the aqueous phase extracted a second time with Et₂ O. The organic extracts were combined, dripped through Na₂ SO₄ to remove water, and evaporated to provide 17.45 g of a crude mixture of the title products. Preliminary purification (without separation of diastereomers) was achieved on two sequential silica columns (EtOAc:hexane). Final purification and separation of diastereomers A and B was accomplished via HPLC (Waters RCM 1.2.3 system; 3 piggybacked Nova C18 columns, each 40×100 mm, 6μM particles; flow rate=45 mL/min (c. 1100 psi); UV detection at 245 nm/1.0 AUFS; eluent 64% MeOH:H₂ O with 2.5% HOAc; loading c. 50-60 mg/injection). Three fractions were collected: the first was highly enriched in diastereomer A, the second contained a mixture of A and B (which was recycled), and the third was highly enriched in diastereomer B. The first fractions from various runs were combined, evaporated, and the residue lyophilized to yield diastereomer A. Processing of the third fractions from various runs in a similar fashion yielded diastereomer B. The diastereomeric purity of A and B were determined on analytical HPLC (Nova C18 column; eluent 70% MeOH:H₂ O with 1% HOAc at 1500 psi; UV detection at 254 nm), and were typically in the range 95-100%.

Diastereomer A: ¹ H NMR (CDCl₃) δ 1.48 (d, J=8 Hz, 3H), 3.88 (d, J=6 Hz, 1H), 5.34 (d, J=6 Hz, 1H), 5.81 (q, J=8 Hz, 1H), 7.03 (m, 1H), 7.15-7.42 (m, 14H), 8.08 (br s, 1H), MS 386 (M+); titration pK_(a) 8.7; [α]_(D) =-23.1°, [α]₃₆₅ =-71.0° (c=0.99, MeOH). Analysis for C₂₄ H₂₂ N₂ O₃ : calculated C 74.59, H 5.74, N 7.25; found C 74.52, H 5.97, N 7.24. Diastereomer B: ¹ H NMR (CDCl₃) δ 1.42 (d, J=7 Hz, 3H), 3.88 (d, J=5 Hz, 1H), 5.34 (s, 1H), 5.80 (q, J=7 Hz, 1H), 7.14-7.43 (m, 15H), 8.30 (br s, 1H), MS 386 (M+); titration pK_(a) 8.6; [α]_(D) =-18.7°, [α]₃₆₅ =-122.2° (c=1.01, MeOH). Analysis for C₂₄ H₂₂ N₂ O₃ : calculated C 74.59, H 5.74, N 7.25; found C 74.79, H 5.84, N 7.22.

PREPARATION 2 (+)-trans-4,5-Diphenyl-3-pyrazolidinone.

A thick-walled glass hydrogenation tube was charged with diastereomer B of 1-[((R)-α-methylbenzyl)oxycarbonyl]-trans-4,5-diphenyl-3-pyrazol idinone [from Example 139A/139B] (226 mg, 0.586 mmol), 15.0 mL THF and 5% Pd/C catalyst (112 mg) and was shaken on a Parr apparatus under an atmosphere of hydrogen at c. 50 psi pressure for 15.5 hr. The catalyst was filtered off using Celite and washed with THF. The filtrate was evaporated in vacuo to obtain 134 mg (96%) of a white foam:

¹ H NMR (CDCl₃) δ 3.99 (d, J=11 Hz, 1H), 4.66 (br s, 1H), 4.74 (d, J=11 Hz, 1H), 7.20-7.39 (m, 10H), 8.63 (br s, 1H).

PREPARATION 3 (-)-trans-4,5-Diphenyl-3-pyrazolidinone.

Diastereomer A of 1-[((R)-α-methylbenzyl)oxycarbonyl]-trans-4,5-diphenyl-3-pyrazolidinone [from Example 139A/139B] (261 mg, 0.677 mmol) was subjected to hydrogenolysis (17 mL THF, 128 mg 5% Pd/C) and workup as described in Preparation 2 to obtain 154 mg (96%) of a white foam:

¹ H NMR (CDCl₃) δ 4.01 (d, J=11 Hz, 1H), 4.38 (br s, 1H), 5.81 (br s, 1H), 7.18-7.41 (m, 10H); [α]_(D) =-76°, [α]₃₆₅ =-278 ° (c=1.08, CHCl₃).

EXAMPLE 140 (-)-trans-1-[(4-Bromophenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone.

(+)-trans-4,5-Diphenyl-3-pyrazolidinone [from Preparation 2] (70.7 mg, 0.297 mmol) was dissolved in 1.0 mL THF under an argon atmosphere and treated with a solution of 4-bromophenylisocyanate (67.9 mg, 0.343 mmol, 1.15 eq) in 1.0 mL THF. The mixture was stirred for 45 min, then the solvents removed in vacuo. The product was initially purified by chromatography (EtOAc:toluene) to provide 90.4 mg of material, in which impurities were still apparent by NMR. This was dissolved in toluene and hexane added until a precipitate appeared. Solvents were carefully removed by pipette and the remaining solid dried on a vacuum pump, giving 77.3 mg (60%) of a white solid:

¹ H NMR (CDCl₃) δ 4.01 (d, J=7 Hz, 1H), 5.52 (d, J=7 Hz, 1H), 6.90-7.50 (m, 15H), 8.60 (br s, 1H), MS 435, 437 (M+'s for Br isotopes); [α]_(D) =-39°, [α]₃₆₅ =-293° (c=1.26, CHCl₃). Analysis for C₂₂ H₁₈ BrN₃ O₂ : calculated C 60.56, H 4.16, N 9.63; found C 61.43, H 4.29, N 9.58. Enantiomeric excess (ee) 95.1%, based on HPLC assay of diastereomeric purity of precursor diastereomer B from Example 139A/139B.

EXAMPLE 141 (+)-trans-1-[(4-Bromophenyl)aminocarbonyl]-4,5-diphenyl-3-pyrazolidinone.

(-)-trans-4,5-Diphenyl-3-pyrazolidinone [from Preparation 3] (82.9 mg, 0.348 mmol) was dissolved in 1.0 mL THF under an argon atmosphere and treated with a solution of 4-bromophenylisocyanate (76.8 mg, 0.388 mmol, 1.11 eq) in 1.0 mL THF. The mixture was stirred for 30 min, then the solvents removed in vacuo. The product was initially purified by chromatography (33->66% EtOAc:toluene gradient) to provide 51.6 mg of material, in which impurities were still apparent by NMR. This was triturated with hexane, then the resulting solid recrystallized from CH₂ Cl₂ :toluene:hexane. Careful removal of solvents via pipette and drying on a vacuum pump yielded 20.8 mg (14%) of a white solid: ¹ H NMR (CDCl₃) δ 4.02 (d, J=7 Hz, 1H), 5.52 (d, J=7 Hz, 1H), 6.90-7.50 (m, 15H), 8.60 (br s, 1H), MS 435, 437 (M+'s for Br isotopes); [α]_(D) =+40°, [α]₃₆₅ =+299° (c=0.88, CHCl₃). Analysis for C₂₂ H₁₈ BrN₃ O₂ : calculated C 60.56, H 4.16, N 9.63; found C 61.93, H 4.43, N 9.37. Enantiomeric excess (ee) 100%, based on HPLC assay of diastereomeric purity of precursor diastereomer A from Example 139A/139B.

EXAMPLE 142 (+)-trans-1-[(4-Chloro-3-trifluoromethylphenyl)-aminothiocarbonyl]-4,5-diphenyl-3-pyrazolidinone.

(+)-trans-4,5-Diphenyl-3-pyrazolidinone [from Preparation 2] (134 mg, 0.561 mmol) was dissolved in 8.0 mL THF under nitrogen and a solution of 4-chloro-3-trifluoromethylphenylisothiocyanate (137 mg, 0.578 mmol, 1.03 eq) in 2 mL THF was added. The mixture was stirred for 12 hr and then the solvent removed in vacuo. The residue was first purified on two sequential silica columns (EtOAc:hexane with 0.5% HOAc). The partially purified material so obtained (155 mg) was dissolved in CH₂ Cl₂ and extracted three times with pH 10 buffer. The aqueous extracts were combined, acidified with 1.0N HCl, and extracted three times with CH₂ Cl₂. The organic extracts were combined, dripped through Na₂ SO₄ to remove water, and evaporated in vacuo to give 93.5 mg (35%) of the product as a pale yellow foam:

¹ H NMR (CDCl₃) δ 4.10 (d, J=5 Hz, 1H), 5.74 (d, J=5 Hz, 1H), 7.35-7.60 (m, 15H); MS 475 (M+);[α]_(D) =+32°, [α]₃₆₅ =-116° (c=1.06, CHCl₃). Analysis for C₂₃ H₁₇ ClF₃ N₃ OS: calculated C 58.05, H 3.60, N 8.83; found C 57.86, H 3.79, N 8.69. Enantiomeric excess (ee) 98.6%, based on HPLC assay of diastereomeric purity of precursor diastereomer B from Example 139A/139B.

EXAMPLE 143 (-)-trans-1-[(4-Chloro-3-trifluoromethylphenyl)-aminothiocarbonyl]-4,5-diphenyl-3-pyrazolidinone.

(-)-trans-4,5-Diphenyl-3-pyrazolidinone [from Preparation 3] (147 mg, 0.617 mmol) was dissolved in 8.0 mL THF under nitrogen and treated with a solution of 4-chloro-3-trifluoromethylphenylisothiocyanate (160 mg, 0.673 mmol, 1.09 eq) in 3 mL THF. The mixture was stirred for 1.5 hr and the solvent then removed in vacuo. The product was stirred for 1.5 hr and the solvent then removed in vacuo. The product was purified as for Example 142, except that the initial chromatographic steps were omitted, and the entire extractive procedure was repeated a second time, to yield 145 mg (49%) of a pale yellow foam:

¹ H NMR (CDCl₃) δ 4.14 (d, J=5 Hz, 1H), 5.74 (d, J=5 Hz, 1H), 7.35-7.60 (m, 15H); MS 475 (M+); [α]_(D) =-28°, [α]₃₆₅ =+128° (c=1.15, CHCl₃). Analysis for C₂₃ H₁₇ ClF₃ N₃ OS: calculated C 58.05, H 3.60, N 8.83; found C 57.77, H 3.67, N 8.64. Enantiomeric excess (ee) 97.2%, based on HPLC assay of diastereomeric purity of precursor diastereomer A from Example 139A/139B.

TEST PROCEDURES FOR CCK AND GASTRIN RECEPTOR BINDING (IC₅₀) Brain

Brain CCK receptor binding was performed using mouse brain membranes according to the method of Chang and Lotti (Proc. Natl. Acad. Sci. 83: 4923-4926, 1986). Male CF-1 mice, 23-25 g were sacrificed by cervical dislocation, the forebrain removed and placed in ice cold 50 mM Tris buffer, pH 7.4. The tissue was homogenized in 100 volumes of the Tris buffer with a Brinkman Polytron or Tekmar Tissumizer and then centrifuged at 40,000 g for 10 min. Pellets were resuspended in Tris buffer, centrifuged as above and then resuspended in 100 volumes of assay buffer, pH 6.5 (20 mM N-2-hydroxyethyl-piperazine-N'-2-ethane sulfonic acid (HEPES), 1 mM ethylene glycol bis(2-aminoethyl ether-N,N,N',N'-tetraacetic acid) (EGTA), 5 mM MgCl₂, 130 mM NaCl, and 0.25 mg/ml bacitracin). The binding assay consisted of 50 μL of compound (or buffer for total binding), 50 μL of ¹²⁵ I-CCK-8 sulfate (20 pM) (Amersham IM-159 ), 200 μL of assay buffer and 200 μL of homogenate (80-120 μg protein). The samples were incubated at room temperature (25°) for 2 hours, and they were then filtered through GF/B glass fiber filters (soaked in wash buffer for 2 hours before use) using a 48 well Brandel cell harvester designed for receptor binding. The filters were washed twice with 3 ml of 50 mM Tris buffer, pH 7.4, containing 0.01% BSA and then counted for radioactivity in plastic tubes with a Micromedic 10/600 automatic gamma counter.

Compounds were dissolved in dimethyl sulfoxide (DMSO) at a concentration of 10 mM and then further diluted with assay buffer. The concentration of DMSO in the incubation was 0.1% or less and had no effect on the assay at that level. IC-50 values of displacement curves were determined using 7 concentrations of compound and were calculated using the ALLFIT computer program of DeLean, Munson and Rodbard (Am. J. Physiol. 235: E97-E102, 1978). Non-specific binding was determined as the displacement of the radioligand by 100 nM CCK-8 sulfate.

Pancreas

Binding to peripheral type CCK receptors in rat pancreas was done according to the method of Chang et al. (Mol. Pharmacol. 30: 212-217, 1986) using ³ H-L364, 718. Pancreas was obtained from male Sprague-Dawley rats, 150-200 g, after decapitation, and dissected free from adipose and connective tissue. The tissue was homogenized in 30 volumes of 50 mM Tris buffer, pH 7.4 and centrifuged at 40,000 g for 10 min. The tissue pellet was washed by resuspension and centrifugation as described above. The final pellet was suspended in 500 volumes of assay buffer (50 mM Tris buffer, pH 7.4, 5 mM MgCl₂, 0.14 mg/ml bacitracin, and 5 mM dithiothreitol) to give a protein concentration of 30-60 μg/200 μl. Reagent volumes for the assay were the same as those used for CCK binding to brain membranes. Tritium labeled L-364,718 (Dupont NEN, NET-971) was used as the ligand at a concentration of 0.4-0.6 nM. The samples were incubated 1 hour at room temperature and then filtered as described for the CCK-brain receptor. Scintillation cocktail was added to the filters which were counted for radioactivity using a Micromedic Taurus automatic liquid scintillation counter.

Compound samples were prepared and IC-50 values were determined as described for the CCK-brain experiments. Non-specific binding was that amount left bound to the filters after adding 100 nM L-364,718.

Gastric Mucosa

The method used for gastrin binding to guinea pig stomach mucosal membranes was similar to that described by Takeuchi, Speir and Johnson (Am. J. Physiol. 237(3): E284-E294, 1979). Guinea pig stomach fundus was obtained from male Hartley guinea pigs, 300-350 g, and the mucosa was scraped off with a glass slide. The mucosa was homogenized in 50 mM Tris buffer, pH 7.4, containing 1 mM phenylmethanesulfonyl fluoride using a Dounce glass homogenizer, and the suspension was centrifuged at 40,000 g for 10 min. The resulting pellet was resuspended and centrifuged once more, the final pellet was then suspended in 100 ml assay buffer per 1 guinea pig stomach to give a protein concentration of 200-300 μg/200 μl. The assay buffer consisted of 50 mM Tris buffer, pH 7.4, 5 mM MgCl₂, 0.14 mg/ml bacitracin, and 1 μg/ml each of leupeptin, chymostatin, aprotinin and pepstatin. Reagent volumes for the assay were the same as those used for CCK binding to brain membranes. The radioactive ligand was 20 pM ¹²⁵ I-gastrin I, from DuPont NEN (NEX-176). The samples were incubated 3 hours at room temperature and filtered and counted as described for CCK binding to brain membranes. Compound samples were prepared and IC-50 values were determined as described for the CCK-brain receptor binding. Non-specific binding was determined using 100 nM gastrin I (human synthetic from Sigma Chemical Co.).

Table III below summarizes representative CCK and gastrin-binding tests results for exemplified compounds in accordance with this invention.

                  TABLE III                                                        ______________________________________                                         CCK and Gastrin Receptor Binding Data                                                     IC.sub.50, μM, or                                                Compound of                                                                               Percent Inhibition (at 1 or 10 μM)                               Example No.                                                                               Brain        Pancreas  Gastrin                                      ______________________________________                                          1         0.022        0.19      0.15                                          2         0.29         14(10)                                                  3         0.054        34(10)    1.1                                           4         0.39         78(10)                                                  5         77(10)       18(10)                                                  6         4.4          15(10)                                                  7         1.1          81(10)                                                  8         34(10)        2(10)                                                  9         3.7          33(10)                                                 10         57(10)        4(10)                                                 11         67(10)                                                              12         0.34 (O-)    64(10)                                                            1.9 (N-)     55(10)                                                 13         67(10)                                                              14         2.6          60(10)                                                 15         69(10)       10(10)                                                 16         0.044        62(10)    0.42                                         17         0.52          6(10)                                                 18         0.093        22(10)                                                 19         68(10)       36(10)                                                 20         0.031        11.6      0.49                                         21         0.057        77(10)                                                 22         42(1)        27(10)                                                 23         0.49         23(10)                                                 24         0.15         45(10)                                                 25         0.21         14(10)                                                 26         0.075        47(10)                                                 27         0.23         60(10)                                                 28         0.44         55(10)                                                 29         0.025        47(10)    0.26                                         30         0.031        49(10)    0.35                                         31         54(1)        71(10)                                                 32         42(1)        69(10)                                                 33         0.34         20(10)                                                 34         1.5          12(10)                                                 35         0.39         48(10)                                                 36         0.45         33(10)                                                 37         82(1)        75(10)                                                 38         0.056        53(10)    0.24                                         39         0.33         52(10)                                                 40         0.75         38(10)                                                 41         57(10)       21(10)                                                 42         0.78         37(10)                                                 43         0.23         24(10)                                                 44         0.26         67(10)                                                 45         0.022        0.16                                                   46         0.042        1.2       0.21                                         47         0.39         51(10)                                                 48         0.080        98(10)                                                 49         0.043        40(10)    0.25                                         50         0.013        87(10)    0.081                                        51         18(1)        25(10)                                                 52         60(1)        21(10)                                                 53         1.2          17(10)                                                 54         1.15         53(10)                                                 55         0.60         47(10)                                                 56         25(1)        15(10)                                                 57         1.0          45(10)                                                 58         10(1)        85(10)                                                 59         44(1)        75(10)                                                 60         34(10)       37(10)                                                 61         56(10)       78(10)                                                 62         2.2          37(10)                                                 63         0.51         0.075                                                  64         5.3          34(1)                                                  65         50(10)       37(10)                                                 66         40(10)       23(10)                                                 67         46(10)                                                              68         4.3          70(10)                                                 69         0.5          12(10)                                                 70         13(1)        36(10)                                                 71         1.2          39(10)                                                 72         88(10)       22(10)                                                 73         16(10)       20(10)                                                 74         23(10)       15(10)                                                 75         60(10)       40(10)                                                 76         55(10)        4(10)                                                 77         56(10)       20(10)                                                 78          1.8         49(10)                                                 79         43(10)        9(10)                                                 80         5.2           9(10)                                                 81         95(10)       59(10)                                                 82         23(10)                                                              83         37(1)        12(10)                                                 84         70(10)       26(10)                                                 85         78(10)       19(10)                                                 86         1.1          58(10)                                                 87         47(10)       23(10)                                                 88         40(10)       37(10)                                                 89         34(10)       21(10)                                                 90         45(1)        63(10)                                                 91         0.010        94(10)    0.062                                        92         0.064        88(10)    0.16                                         93         0.29         75(10)    0.66                                         9          50(10)                                                              95         55(10)       18(10)                                                 96         42(10)       13(10)                                                 97         42(10)                                                              98         74(10)       33(10)                                                 99         3.3          86(10)                                                 100        2.2          78(10)                                                 101        1.3           7(10)                                                 102        4.7          11(10)                                                 103        0.87         78(10)                                                 104        0.9          47(10)                                                 105        0.49         43(10)                                                 106        0.19         78(10)    0.87                                         107        86(10)       61(10)                                                 108        1.3          87(10)                                                 109        6.0          11(10)                                                 110        0.007        47(10)    0.13                                         111        0.020        35(10)    0.61                                         112        0.072        42(10)    1.4                                          113        25(1)        21(10)                                                 114        0.020        38(10)    0.36                                         115        0.15         53(10)    0.32                                         116        0.031        80(10)    0.23                                         117        0.40         64(10)    1.0                                          118        0.36         41(10)    5.2                                          119        1.2          64(10)                                                 120        0.016        87(10)    0.12                                         121        0.014        26(10)    0.12                                         122        0.015        8.6       0.22                                         123        0.068        23(10)    0.69                                         124        0.15         36(10)    0.73                                         125        0.10         42(10)    0.59                                         126        0.011        59(10)    0.21                                         127        0.032        73(10)    0.21                                         128        0.49         39(10)                                                 129        0.16         69(10)    0.86                                         130        0.012        42(10)    0.10                                         131        0.012        61(10)    0.062                                        132        0.008        48(10)    0.070                                        133        0.006        7.9       0.025                                         133A      0.36         55(10)    1.5                                          134        0.033        75(10)    0.093                                        135        0.14         18(10)    1.7                                          136                     0.16                                                   137                     0.032                                                  138                     0.069                                                  140        0.37                                                                141        0.016                                                               142                     0.017                                                  143                     0.81                                                   ______________________________________                                     

We claim:
 1. A pharmaceutical formulation comprising as an active ingredient an effective amount of a compound of A compound of the formula ##STR22## wherein R and R¹ are independently hydrogen, C₁ -C₆ alkyl, phenyl, benzyl, naphthyl, pyridyl or substituted phenyl having 1, 2, or 3 substituents selected from the group consisting of C₁ -C₆ alkyl, C₁ -C₆ alkoxy, C₁ -C₆ alkylthio, halo, trifluoromethyl, phenyl, phenoxy, phenyl (C₁ -C₄ alkyl), phenyl(C₁ -C₄ alkoxy), phenylacetyl C₁ -C₆ alkanoyl, cyano, carbamyl, nitro, C₁ -C₆ alkoxycarbonyl, methylenedioxy, C₃ -C₆ alkylene, amino, --NH(C₁ -C₄ alkyl or benzyl), and N(C₁ -C₄ alkyl)₂ ;R₂ is hydrogen, C₁ -C₆ alkyl, carboxymethyl, C₁ -C₄ alkoxycarbonylmethyl or a group of the formula ##STR23## wherein t is 1 or 0; A is --CH₂ --, --O--, --NH-- or --N(C₁ -C₆ alkyl)--; and Y is phenyl or substituted phenyl as defined above; R₃ is hydrogen or a group of the formula ##STR24## wherein B is O or S; n is 0 or 1; Q is --NH--, --N(C₁ -C₆ alkyl)--, --S--, or --O--; and R⁵ is a group of the formula --[CH(R⁶)]_(q) --(CH₂)_(r) --R⁷ wherein R⁶ is hydrogen or C₁ -C₆ alkyl; q is 0 or 1; r is 0, 1 or 2; and R⁷ is hydrogen, C₁ -C₈ alkyl, C₃ -C₈ cycloalkyl, pentafluorophenyl, pyridyl, tetrahydro-naphthyl, indolyl, quinolinyl, phenyl, naphthyl, or phenyl or naphthyl substituted with 1, 2, or 3 substituents as defined above for phenyl; or the group --(Q)_(n) R⁵ is 2-tetrahydroisoquinolinyl; and the pharmaceutically acceptable salts thereof; provided that at least one of the groups R or R¹ is other than hydrogen or C₁ -C₆ alkyl, and R or R¹ is hydrogen only when the other of R and R¹ is substituted phenyl in which the substituent is phenyl; and provided further that at least one of the groups R₂ and R₃ is other than hydrogen, and when R³ is a group of the formula ##STR25## R² is other than a group of the formula ##STR26## and a pharmaceutically acceptable carrier, excipient or diluent therefor.
 2. A pharmaceutical formulation comprising as an active ingredient an effective amount of a compound of claim 1 where R3 is --C(B)(Q)_(n) --[CH(R⁶)]_(q) --(CH₂)_(r) --R⁷, and a pharmaceutically acceptable carrier, excipient or diluent therefor.
 3. A pharmaceutical formulation comprising as an active ingredient an effective amount of a compound of claim 1 where R₃ is --COHR⁷ and a pharmaceutically acceptable carrier, excipient or diluent therefor.
 4. A pharmaceutical formulation comprising as an active ingredient an effective amount of a compound of claim 3 wherein R,R₁ and R⁷ are each phenyl or substituted phenyl and a pharmaceutically acceptable carrier, excipient or diluent therefor.
 5. A method for inhibiting the interaction of cholecystokinin or gastrin with its receptors in a warm-blooded vertebrate thereby antagonizing the influence of endogeneous cholecystokinin or gastrin which method comprising administering to said vertebrate a compound of A compound of the formula ##STR27## wherein R and R¹ are independently hydrogen, C₁ -C₆ alkyl, phenyl, benzyl, naphthyl, pyridyl or substituted phenyl having 1, 2, or 3 substituents selected from the group consisting of C₁ -C₆ alkyl, C₁ -C₆ alkoxy, C₁ -C₆ alkylthio, halo, trifluoromethyl, phenyl, phenoxy, phenyl(C₁ -C₄ alkyl), phenyl(C₁ -C₄ alkoxy), phenylacetyl, C₁ -C₆ alkanoyl, cyano, carbamyl, nitro, C₁ -C₆ alkoxycarbonyl, methylenedioxy, C₃ -C₆ alkylene, amino, --NH(C₁ -C₄ alkyl or benzyl), and N(C₁ -C₄ alkyl)₂ ;R₂ is hydrogen, C₁ -C₆ alkyl, carboxymethyl, C₁ -C₄ alkoxycarbonylmethyl or a group of the formula ##STR28## wherein t is 1 or 0; A is --CH₂ --, --O--, --NH-- or --N(C₁ -C₆ alkyl)--; and Y is phenyl or substituted phenyl as defined above; R₃ is hydrogen or a group of the formula ##STR29## B is O or S n is 0 or 1; Q is --NH--, --N(C₁ -C₆ alkyl)--, --S--, or --O--; and R⁵ is a group of the formula --[CH(R⁶)]_(q) --(CH₂)_(r) --R⁷ wherein R⁶ is hydrogen or C₁ -C₆ alkyl; q is 0 or 1; r is 0, 1 or 2; and R⁷ is hydrogen, C₁ -C₈ alkyl, C₃ -C₈ cycloalkyl, pentafluoroophenyl, pyridyl, tetrahydro-naphthyl, indolyl, quinolinyl, phenyl, naphthyl, or phenyl or naphthyl substituted with 1, 2, or 3 substituents as defined above for phenyl; or the group --(Q)_(n) R⁵ is 2-tetrahydroisoquinolinyl; and the pharmaceutically acceptable salts thereof;provided that at least one of the groups R or R¹ is other than hydrogen or C₁ -C₆ alkyl, and R or R¹ is hydrogen only when the other of R and R¹ is substituted phenyl in which the substituent is phenyl; and provided further that at least one of the groups R₂ and R₃ is other than hydrogen, and when R³ is a group of the formula ##STR30## R² is other than a group of the formula ##STR31## in an amount effective to antagonize the influence of cholecystokinin or gastrin in said vertebrate.
 6. A method for treating irritable bowel syndrome which comprises administering to a warm blooded vertebrate an effective amount of a compound of the formula ##STR32## wherein R and R¹ are independently hydrogen, C₁ -C₆ alkyl, phenyl, benzyl, naphthyl, pyridyl or substituted phenyl having 1, 2, or 3 substituents selected from the group consisting of C₁ -C₆ alkyl, C₁ -C₆ alkoxy, C₁ -C₆ alkylthio, halo, trifluoromethyl, phenyl, phenoxy, phenyl(C₁ -C₄ alkyl), phenyl(C₁ -C₄ alkoxy), phenylacetyl, C₁ -C₆ alkanoyl, cyano, carbamyl, nitro, C₁ -C₆ alkoxycarbonyl, methylenedioxy, C₃ -C₆ alkylene, amino, --NH(C₁ -C₄ alkyl or benzyl), and N(C₁ -C₄ alkyl)₂ ;R₂ is hydrogen, C₁ -C₆ alkyl, carboxymethyl, C₁ -C₄ alkoxycarbonylmethyl or a group of the formula ##STR33## wherein t is 1 or 0; A is --CH₂ --, --O--, --NH-- or --N(C₁ -C₆ alkyl)--; and Y is phenyl or substituted phenyl as defined above; R₃ is hydrogen or a group of the formula ##STR34## wherein B is O or S n is 0 or 1 Q is --NH--, --N(C₁ -C₆ alkyl)--, --S--, or --O--; and R⁵ is a group of the formula --[CH(R⁶)]_(q) --( CH₂)_(r) --R⁷ wherein R⁶ is hydrogen or C₁ -C₆ alkyl; q is 0 or 1; r is 0, 1 or 2; and R⁷ is hydrogen, C₁ -C₈ alkyl, C₃ -C₈ cycloalkyl, pentafluorophenyl, pyridyl, tetrahydro-naphthyl, indolyl, quinolinyl, phenyl, naphthyl, or phenyl or naphthyl substituted with 1, 2 or 3 substituents as defined above for phenyl; or the group --(Q)_(n) R⁵ is 2-tetrahydroisoquinolinyl; and the pharmaceutically acceptable salts thereof; provided that at least one of the groups R or R¹ is other than hydrogen or C₁ -C₆ alkyl, and R or R¹ is other than hydrogen or C₁ -C₆ alkyl, and R or R¹ is hydrogen only when the other of R and R¹ is substituted phenyl in which the substituent is phenyl; and provided further that at least one of the groups R₂ and R₃ is other than hydrogen, and when R³ is a group of the formula ##STR35## R² is other than a group of the formula ##STR36##
 7. A method of claim 6 which comprises administering a compound of formula ##STR37##
 8. The method of claim 7 wherein R² is hydrogen.
 9. The method of claim 8 wherein R³ is a group --CB(Q)_(n) --[CH(R⁶)]_(q) --(CH₂)_(r) --R7.
 10. The method of claim 9 wherein q and r are
 0. 11. The method of claim 10 wherein R, R¹ and R⁷ are each phenyl or substituted phenyl.
 12. The method of claim 11 wherein R and R¹ are in the trans stereochemical configuration.
 13. The method of claim 9 wherein R⁷ is bromophenyl. 